An arboretum is a garden built around trees, shrubs and other woody plants, usually labeled and arranged for study as well as walking. Many are on university campuses or in public parks, so check which parts of the grounds are open and where visitors park. This list has 162 gardens in 42 states.
Admission and hours checked September 28, 2026. Prices may change.
A 16-acre campus arboretum at Auburn University with native plant collections and more than two miles of trails. Weekday parking needs a university permit.
A 60-acre university arboretum in Tuscaloosa with native woodland trails and wildflower, experimental and children's gardens. Entry is free and it is open daily.
Arboretum in Superior, Arizona with desert plant gardens, trails and the 13-acre Wallace Desert Garden. Hours change by month; the last admission is one hour before closing.
High-elevation arboretum in the Coconino National Forest with gardens, woods, a native plant nursery and a daily naturalist walk. Open Wednesday to Sunday during a seasonal summer and fall run.
A 49-acre Sonoran Desert garden and nature preserve in Tucson with trails, galleries and shops. Grounds open 8 a.m. to 5 p.m. daily.
A 26-acre campus arboretum at Cal State Fullerton, open every day. A $5 donation is suggested.
Arboretum and botanic garden in Arcadia, California, open daily from 9 am. Adult admission is $18, and tickets can be bought online before the visit.
A 17-acre park and arboretum in Concord with an international garden and a community garden. Entry and parking are free.
Arboretum of over 200 acres and 25 acres of display gardens at Turtle Bay Exploration Park in Redding, with a one-mile trail loop. Garden entry is a suggested $5 donation.
Campus-wide arboretum at Palomar College in San Marcos with themed gardens and trails. Entry is free and a paid visitor parking permit is needed.
Volunteer society based in San Mateo Central Park that keeps a rose garden of over 150 roses, native plant beds and a plant nursery. The nursery is open on weekends.
An accredited arboretum with gardens around a historic adobe mill in San Marino. Gardens are open Tuesday to Sunday and closed Mondays.
A 3.5-acre campus garden with more than 1,400 labeled plants from California and elsewhere. Open every day from sunrise to sunset; guided tours can be requested by email.
A 93-acre public garden in Stamford with 13 gardens, champion trees, wetlands and trails. Grounds open dawn to dusk every day and entry is free; leashed dogs are allowed.
A 750-acre college arboretum in New London with a native plant collection, the Caroline Black Garden and a greenhouse. Open daily sunrise to sunset, free.
State park arboretum of over 250 Mesozoic-era plant species beside a dinosaur trackway museum; grounds and arboretum are free and open daily.
A 100-plus acre preserve in Redding with native tree, shrub and kalmia collections and trail guides. It is open weekdays only, and visitors should call ahead and sign in at the Barn.
University botanic gardens of about 15 acres in Newark with ten garden areas and a trial garden. No entry fee; open every day; parking is metered.
A city park with a nine-acre arboretum of over 200 exotic trees along a half-mile walking path. Park and arboretum are open daily sunrise to sundown; free guided tours run monthly.
Arboretum of 136 acres in Jacksonville with seven trails and 13 ecosystems. Adults pay $3 at the kiosk after parking; leashed dogs are allowed.
University of Miami teaching arboretum of tropical trees with labels and signs for self-guided visits. Entry is free and open 7 days a week; parking is metered.
An arboretum in Milledgeville with walking and driving access to the grounds, nature trails and a meadow. Grounds are free; Rose Hill tours cost $5.
A University of Hawaiʻi arboretum in upper Mānoa Valley with over 7 miles of trails and more than 6,000 tropical plant taxa. Open weekdays only.
Small downtown Eagle park with labeled plantings, including 37 tree varieties, native plants and roses, plus walking paths, picnic tables and benches.
Boise city arboretum with about 90 deciduous tree species and over 20 conifer species, managed by Community Forestry. Open sunrise to sunset; parking is at a nearby park.
A 63-acre University of Idaho arboretum with native and introduced plants and a 1.4-mile gravel loop road. Free, open daily, with free parking.
University of Illinois arboretum in Urbana with gardens and natural areas across more than 100 acres. Entry is free; open daily from sunrise to sunset.
A 155-acre arboretum and botanic garden in Rockford with 12 specialty gardens, paved paths and wooded trails. Paid admission; leashed dogs are welcome.
Evanston arboretum on a narrow strip beside the North Shore Canal, with trees grouped by plant family, gardens, sculptures and a bird sanctuary. The Ecology Center sits inside it.
36-acre public garden on the SIUE campus with a half-mile paved loop, butterfly, prairie and English cottage gardens and student sculpture. Entry and parking are free.
A 1,700-acre tree arboretum in Lisle with trails, tree and plant collections and a Children's Garden. Timed ticket purchase is available online; entry includes parking.
Arboretum in Richmond, Indiana with 330 acres and 16 miles of trail, plus a nature center and auto tour. No entry fee; hours change by season.
A 15-acre arboretum in Clinton with a large dwarf conifer collection, peony, rose and daylily gardens. The grounds are open every day of the year.
City park in Indianola with an arboretum, formal and butterfly gardens and a children's garden. A printed self-guided tree tour is kept in a display case near the gazebo.
Arboretum and botanic garden in Waterloo, Iowa, open Tuesday through Sunday. Adults pay $10; children 4 and under are free.
Dubuque gardens with conifer and tree collections, a Japanese garden and a visitor center with a gift shop. Restrooms are accessible and a wheelchair can be borrowed free.
A 5-acre county park arboretum near Perry with over 100 species of mostly native trees and shrubs, next to a free museum. The park grounds are open year-round.
A community-supported public garden near Madrid with tree groves, woodland and prairie trails and a treehouse village. Paid admission; members enter free.
Nonprofit public garden and arboretum in Newton, Iowa with several garden landscapes and trails. Entry is free and the grounds open daily from sunrise to sunset.
A tree arboretum near Dallas Center with walking trails and a nature play area. Entry is free and dogs need a pass.
Great Plains arboretum in Hesston, Kansas. The grounds are open daily from sunrise to sunset, with a small per-person fee paid at a pole on site.
Non-profit arboretum near Wakefield, Kansas with native and exotic trees, wetlands, woodlands and meadows. Trails are open year-round from sunrise to sunset.
300-acre arboretum in Overland Park, Kansas with themed gardens, natural areas and hiking trails. Admission is $7 for adults and free on the first Tuesday of each month.
Nineteen-acre city arboretum in Parsons, Kansas with trees, a wetlands area, nature trails and a visitors center. Entry is free.
Large forest and arboretum in Clermont, Kentucky with 40 miles of trails, gardens and a natural playground. A per-vehicle admission is suggested.
Arboretum of about 121 acres in Union, Kentucky with more than 5,500 trees and shrubs. Open daily with no charge for admission or parking.
Old tree collection on 4.5 acres at the Garden Club of Kentucky headquarters in Paris, Kentucky. Open to the public and free; guided tours by request.
A 100-acre public garden on the University of Kentucky campus with a native plant walk, horticultural gardens and a children's garden. Grounds are free.
Wooded arboretum in Baton Rouge with more than 300 tree and shrub species, an orchard, a butterfly garden and bamboo. Entry is free on weekdays.
State preservation area near Ville Platte with over 600 acres of native Louisiana forest and about 5 miles of trails. Entry is free; pets and picnics are not allowed.
Fourteen-acre arboretum in Baton Rouge with Louisiana native trees and shrubs. Grounds are free and open daily from dawn to dusk.
Labeled trees and shrubs in Payson Park, Portland, kept by the Longfellow Garden Club with the city. The site says it is free and open daily.
A 224-acre arboretum in Augusta with cultivated gardens, orchards and about six miles of trails. Entry is free and the grounds are open daily from sunrise to sunset.
400 acre native garden and preserve on Maryland's Eastern Shore with 5 miles of trails. Admission is free every day.
200 acre arboretum in Baltimore with specimen trees, gardens, wooded trails and a nature center. Grounds are open Tuesday to Sunday and closed Mondays.
A 281-acre tree and shrub collection of over 15,000 accessioned plants, open daily at no charge. The visitor center keeps shorter hours than the grounds.
Milton arboretum with formal gardens, orchards, woodland and wetland on about 22 acres. Kousa dogwoods flower in June; open weekdays for a suggested $5 donation.
Arboretum on Martha's Vineyard with azaleas, stewartias, magnolias and other trees and shrubs. Grounds are open sunrise to sunset; adults pay $10 from May to October.
Northampton college garden with a 12,000-square-foot conservatory, about 6 acres of outdoor gardens and a 127-acre campus arboretum. Free and open daily.
A historic university garden and campus arboretum on the Michigan State campus, open free to everyone. Visitor parking is in Lot 62 with a pay kiosk.
A 383-acre preserve in Burton with a 116-acre accredited arboretum, gardens and over 7 miles of trails. Grounds open daily; the visitor center has set hours.
University of Michigan arboretum in Ann Arbor of 123 acres with trails, gardens, meadows, river access and a large historic peony collection. Open daily and free.
A 48-acre Hillsdale College arboretum with trails, ponds, a waterfall and a children's garden, open every day from dawn to dusk.
A 400-acre nature preserve and arboretum in Brainerd and Baxter with gardens, 12 miles of trails and native habitats. Non-members pay a gate fee.
Campus arboretum with over 2.5 miles of trails through forest and prairie areas, formal gardens and an interpretive center. Open in daylight hours all year with no admission fee.
A 1,200-acre arboretum in Chaska with maintained gardens, rare plant collections and trails. Non-members need a ticket, and advance tickets are recommended.
Native plant arboretum in Picayune with walking trails, a pond area, savanna exhibits with pitcher plants and a visitor center. Open Tuesday to Saturday.
A historic active cemetery that is also a 314-acre Level III arboretum with gardens, prairies and wetlands. The public may walk the grounds daily; gates lock at 5:00 p.m.
A nature reserve in Gray Summit run by the Missouri Botanical Garden, with trails and restored prairie. Ticketed entry; groups must reserve.
Six acres of gardens and an arboretum near Jefferson City, with a nursery and gift shop. Gardens open from Mother's Day through October, weather permitting.
A 70-acre zoo in Billings that is also a botanical garden and accredited arboretum; plantings are seen with zoo admission. Pets are not allowed.
State historical park in Nebraska City with an arboretum, an Italian terraced garden, lilacs, trails and the Morton mansion. Grounds are open year-round; the mansion charges admission.
A 14-acre arboretum around Bill Cox Memorial Lake in Pierce, with tree and perennial gardens. Pets must be leashed.
The arboretum covers the UNLV campus, with desert-adapted trees and a two-acre Xeric Garden by the Barrick Museum. Visitors may walk the grounds any day; guided tours are by request.
Living plant collection of over 4,600 native and adapted species on 13 acres inside Rancho San Rafael Regional Park. Entry is free during park hours.
County display gardens in Somerset with a formal rose garden, perennial and sensory gardens inside an accredited arboretum. Free to visit.
Historic woodland garden and education site in Short Hills. Fall and winter hours are 9am to 4pm daily.
Public arboretum in Morris Township on 124 acres with about 2,000 specimen trees, 28 garden areas, meadows and trails. Open daily from 8 am to sunset.
County arboretum in Clinton Township with a garden, gazebos, picnic grove and nature trails. Grounds are open daily and admission is free.
Historic estate arboretum in Summit with gardens, trails and a visitors center. Grounds are open daily and free to explore, with a suggested donation.
University campus arboretum with about 2,200 trees and shrubs and four historic gardens, including a Japanese garden. The grounds have no gate and no admission fee.
Community arboretum with a Children's Garden of mostly native plants, a boxwood maze, an apiary and musical instruments. The Children's Garden is open dawn to dusk.
Morris County arboretum in Chester Township with formal and informal gardens, meadow paths and over 3,500 plant species. Open daily; a seasonal phone tour is available.
Nassau County park arboretum in Locust Valley run by the Friends of Bailey Arboretum. Open Wednesday to Sunday; deer live on the property.
An arboretum across Bard College's campus by the Hudson River, including Blithewood Garden and Montgomery Place grounds. Free, open daily sunrise to sunset.
Long Island arboretum with tree and plant collections, a manor house and a cafe. Open Tuesday to Sunday, with an $8 car fee on set dates.
Cultivated gardens, an arboretum and natural areas on and near the Cornell campus in Ithaca. Grounds are open daily; the welcome center is open Tuesday to Sunday.
An Olmsted-designed park arboretum in Rochester with lilacs, magnolias, rhododendrons and the Lamberton Conservatory. The conservatory is open daily 10am to 4pm.
A nonprofit arboretum in Esperance with trails for walking and hiking. Grounds are open every day; parking is free and a small donation is suggested.
County-run public gardens in Katonah with thirty garden areas and collections, plus a veterans museum. The park is open 8 a.m. to 4 p.m.
A 200 acre public garden in the Catskills with gardens, meadows, forest trails and a labyrinth. Gardens and trails are open every day; non-members are asked for a $5 donation.
A town arboretum in the village of Ellicottville next to the Town Center, with a nature trail. Free to enter and open every day.
Oyster Bay estate of 409 acres with over 20 gardens, woodland trails, two greenhouses and a Tudor Revival mansion. Parking fees apply on some days.
Five-acre arboretum on the UNC campus in Chapel Hill with flat walking paths, open lawns, and native and East Asian trees and shrubs. Open every day from dawn to dusk.
17-acre city arboretum in Greensboro with 14 plant collections, display gardens, a rose garden and a butterfly garden. Admission is free and leashed dogs are allowed.
NC State University garden in Raleigh with a large collection of plants suited to the Southeast. Open every day of the year with free admission and limited free parking.
County extension arboretum in Wilmington, a 7-acre garden of trees, shrubs and other plants suited to southeastern North Carolina. Grounds are open daily 8 a.m. to 5 p.m.
55-acre garden at Duke University with historic terraces, a native plant garden and an Asiatic arboretum. Entry is free; campus parking costs $2 per hour and fills early.
County-run arboretum and gardens inside Tanglewood Park in Clemmons showing plants that grow in the Piedmont, with monthly classes. Open during park hours; a per-vehicle park fee applies.
Arboretum near Asheville with display gardens, a bonsai exhibition garden, trails and a visitor center. No admission fee, but parking costs $25 per personal vehicle.
Over 30 acres of gardens, trees and a lake on the Ohio State campus in Columbus. Entry is free and it is open every day of the year from dawn to dusk; parking is paid.
A Five Rivers MetroParks arboretum in Dayton with specialty gardens, a conifer collection, a boxwood maze, woodland trails and a 65-foot tree tower. Parking is free.
A 3,500-acre arboretum east of Cleveland with gardens, trails, lakes, a canopy walk and an emergent tower. Timed online tickets are the recommended way in; closed to the public on Mondays.
An arboretum focused on native Ohio hardwood trees in northeast Knox County, open daily from dawn to dusk except during deer gun seasons.
A 17-acre garden and arboretum in Elmore with the Blair Museum of Lithophanes on site. Open April through October only; adult admission is $14.
An Ohio State University arboretum in Wooster with theme gardens, paved walkways and a children's garden. Admission is free and the grounds are open dawn to dusk every day.
A 9.75-acre arboretum in Indian Hill focused on evergreens and companion plantings. Admission is free; no pets are allowed and renovations may close the main vehicle entrance in 2026-2027.
A nearly 2,000-acre arboretum near Newark with a Japanese garden, a visitor center and walking trails. Adult admission is $10 and the gates close 15 minutes before closing.
A 31.74-acre Bartlesville city park with an arboretum of over 100 tree and shrub species, a tallgrass prairie with wildflowers, and lake paths. It has a handicap-accessible fishing pier.
A city park in Bixby with an arboretum, a river park, a butterfly garden, walking trails and an amphitheater. The park is open from 7:30 a.m. to 11:30 p.m.
A 30-acre historic city garden in Oklahoma City with a color garden, a ten-acre arboretum and the Ed Lycan Conservatory of cacti and succulents.
A 45-acre Tulsa city park with rock gardens, a municipal rose garden, an arboretum, a teaching garden and a conservatory. The park grounds are open every day from 5 a.m. to 11 p.m.
A street-tree arboretum in the median and planting strips of NE Ainsworth Street in Portland. Visitors walk it from the sidewalk; a map and seasonal walking routes are online.
A 190-acre tree collection in Washington Park with 12 miles of trails. Grounds open daily at no charge; parking is paid.
A 209-acre nature area with trails and outdoor exhibits on Willamette Valley ecology. Entry is free; Lane County charges a $5 parking fee per vehicle.
Historic house and grounds in Villanova with an arboretum. Visitors may walk the grounds except during private events, mostly on weekends from April to November.
A 56-acre arboretum in Germantown with planned gardens, historic buildings and a farm. Grounds are free and open every day.
A campus arboretum at Chatham University's Shadyside campus, open for walking and self-guided tours. Entry is free.
Public garden and arboretum on a family homestead in Edinboro. Grounds are open Wednesday to Sunday during the April to October season; donations are asked in place of admission.
A 63-acre college-owned arboretum in Bath with conifers, wetland plants, wildflowers and rhododendrons. Open to visitors in daylight hours; parking is in a gravel lot by the barn.
An arboretum and gardens in Devon with free admission. Use the grounds schedule, not the education center's closing time.
An 11-acre arboretum with over 100 tree species, pollinator gardens and a dwarf conifer garden, on the LancasterHistory grounds in Lancaster. Open to walk from dawn to dusk at no charge.
An arboretum in northwestern Philadelphia. Seasonal closing times and online admission options are published by the garden.
A museum in Reading with a 25-acre arboretum on its grounds. The arboretum is open daily from sunrise to sunset; the museum has separate hours and paid admission.
A public arboretum on Swarthmore College's campus. Follow the college's visitor parking directions.
A 30-acre reserve of trails, meadows and woods with dogwood, magnolia and holly collections, about a mile north of Widener's campus. Open daily and free.
The H.O. Smith Botanic Gardens and surrounding arboretum at Penn State. Free garden admission does not mean free parking.
An arboretum in Media. Check seasonal hours and any membership eligibility before relying on discounted entry.
A 224-acre preserve in Chester County with a 55-acre arboretum around a historic estate house. Grounds are open on weekdays; nonmembers may leave a donation.
A 33-acre estate on Narragansett Bay in Bristol with a 45-room mansion, gardens and an arboretum. General admission covers the mansion and grounds and is paid at the Welcome Center.
Park beside Westerly Library with specimen trees; master gardeners lead walking tours of the trees. Park is open daily from dawn to 9 pm.
A 150-acre city garden in Sumter known for Japanese iris in late spring, with swans, rose, azalea and butterfly gardens. Free entry and parking; open daily from morning to sunset.
10-acre arboretum in Columbia with ten habitat types, a waterfall and a botanical garden. It opens on set days rather than daily.
Formal display gardens of about 25 acres plus a 45-acre arboretum with trails at South Dakota State University in Brookings.
Tree collection of almost 1,500 trees across the 80 acres of Elmwood Cemetery in Memphis, many with name labels. Grounds are open daily with no admission charge.
Nashville estate with eight distinct gardens, an arboretum, a mansion and an art museum on 55 acres. Open Tuesday to Sunday; non-members pay a parking fee.
A 27-acre city arboretum in Brentwood along the Little Harpeth River with over 70 tree species on paved and unpaved trails. Open dawn to dusk daily.
Campus of over 300 acres with 10 miles of trails, native plant landscapes and wildlife. Visitors enter through the main gate during Welcome Center hours.
66-acre garden in Dallas with seasonal displays, trial gardens and events. Open daily; non-member tickets cost up to $25.95.
100-acre wooded arboretum near Athens with two miles of trails, a suspension bridge and a relocated 1850 home. Closed Mondays.
Woodland nature preserve in Houston with trails and a nature center. Admission is free; parking is charged on most days.
A 393-acre Harris County park with 60 acres of themed gardens, trails and a maple collection. Open 8 AM to 7 PM.
A desert plant arboretum with a walking path, plant beds and sculptures inside Kayenta Art Village in Ivins. It is listed as open daily.
A 100-acre garden and arboretum in the Salt Lake City foothills with about 3,000 plant species. Adult admission is $18; hours change by month.
A Utah State University garden in Kaysville with an arboretum, volunteer-tended gardens, wetlands, ponds and trails. Grounds are open sunrise to sunset with no entrance fee.
A 20-acre woodland garden and arboretum in Lexington, Virginia. Visitors can walk the grounds every day from dawn to dusk. Groups of ten or more should contact staff ahead.
A tree collection on the front lawn of the Chatham Hall school campus in Chatham, Virginia, with 27 featured species and a self-guided walking tour. Visiting is free during school hours.
A 51-acre city arboretum in Chesapeake with forest trails and labeled trees for self-guided walks. A camellia collection and a historic farmhouse are on site. Open sunrise to sunset.
A university arboretum with trails, a pond loop and family garden in Harrisonburg. Grounds are free and open dawn to dusk every day.
Richmond estate park of about 100 acres with an Italian garden, Japanese garden and arboretum, plus a farm and a mansion. Tickets are not needed for the grounds.
65-acre city arboretum of labeled trees and woody plants along Garden Springs Creek, with a self-guided walking tour. Free entry, open 6 a.m. to 10 p.m.
Arboretum in Lake Wilderness Park with themed gardens, a children’s forest and a StoryWalk. Free entry, open every day from dawn to dusk.
Five-acre campus arboretum built by horticulture students, with a conifer collection and a view over Elliott Bay. Open every day from dawn until dusk.
230-acre arboretum on Lake Washington with woody plant collections, trails and named garden areas. Grounds are open daily, and the visitor center keeps shorter hours.
A 27-acre arboretum park in Tacoma with more than 600 trees and the W.W. Seymour Botanical Conservatory. Open from half an hour before sunrise.
Urban arboretum of 46 acres in Yakima with display gardens, tree collections and natural areas. Open every day from dawn to dusk.
An arboretum within Spring Hill Cemetery on Capitol Hill in Charleston, with champion trees, wooded trails and a monarch garden. Free entry, dawn to dusk.
Campus arboretum of 290 acres at UW-Green Bay with over 8 miles of trails through prairie, woods and the Niagara Escarpment. Trails are open daily in daylight.
A 105-acre county park near Chilton with 3 miles of trails, an observation tower, an arboretum and native wildflower gardens. The nature center building is closed for remodeling.
Nature and heritage center in the Coon Valley area with the Helga Gundersen Arboretum, nature trails and a historic homestead. Visitors check in at the Thrune Visitors Center.
A 1,200-acre arboretum on the shore of Lake Wingra with trails, restored prairies and a native plant garden. Dogs are not allowed, and there is no admission fee.
Sixty-five acre arboretum and bird sanctuary in Two Rivers with walking trails, pollinator meadows and art. Leashed dogs are welcome and the grounds close at dusk.
These are gardens we could check against their own official websites, not every garden in the area. “Free” refers to general garden entry, not parking, tours or special events. We do not show live opening status.
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