Photo: Ian Howard · CC BY 2.518% of Boston’s land is conserved, and virtually every resident lives within a half mile of a park
Virtually every resident lives within a half mile of a park. 90 miles of mapped trail cross Boston, 1.9 per square mile of land. 18% of Boston’s land is conserved, about 5,641 acres.
Ahead of 91% of U.S. towns · #207 of 283 in Massachusetts. What drives it
What kind of outdoors town is Boston?
Read from the map. The page puts what stands out first.
How much outdoors does Boston have?
On conserved land, trails, park land and how close residents live to a park, Boston is ahead of 91% of U.S. towns, #207 of 283 in Massachusetts. Trail miles hold the grade up; park acres per resident pull it down.
Among the 400 U.S. cities of 100,000 or more, Boston ranks #68 on Outdoors.
Massachusetts towns conserve more land than most (a typical one, 21%; the U.S., 4%), so Boston’s 18% is ahead of 37% of Massachusetts towns, while its trails per square mile lead 46% of them.
Water is 46% of Boston’s area (41 of 90 square miles), so every share here is of land; over land and water together, the conserved share would read 10%.
PAD-US, OpenStreetMap (© OpenStreetMap contributors), Census 2025 Gazetteer and 2020 blocks; details in Sources below. How TownRatings grades the outdoors →
Conserved land, trails & bike routes
Tap a number to zoom to a park. Tap a layer to hide it.
Pick a walk
The longest trail network is Arnold Arboretum, with 9.1 miles. Directions go to the nearest trailhead or public parking.
Franklin Park
Spectacle Island
Allandale Woods
Stony Brook Reservation
Boston Nature Center
Olmsted Park
All 267 parks & preserves
5,641 conserved acres
18% of Boston’s land. Water is left out: Boston has 48.3 square miles of land and 41.3 of water, so the share counts land only. Who manages Boston’s conserved land, from the USGS Protected Areas Database. Approximate, because parcels can overlap.
Conserved doesn’t always mean open to visitors. 296 acres are conservation easements, usually private land. Public access isn’t recorded for 25 of 660 parcels. The walks above are places people visit.
| Parcel (PAD-US) | Managed by | Acres | Public access |
|---|---|---|---|
| Stony Brook Reservation State Park | Not recorded | 564 | Open |
| Franklin Park Local Park | Town or city | 425 | Open |
| Neponset River Reservation State Conservation Area | Not recorded | 337 | Open |
| Charles River Reservation State Park | Not recorded | 268 | Open |
| Long Island Local Park | Town or city | 223 | Open |
| Boston Harbor Islands State Park Local Park | Not recorded | 206 | Open |
| Arnold Arboretum I Local Other or Unknown | Town or city | 156 | Open |
| Old Harbor Reservation State Park | Not recorded | 147 | Open |
| Mt Hope Cemetery Local Park | Town or city | 129 | Open |
| St Joseph Cemetery Private Historic or Cultural | Not recorded | 108 | Open |
5 smaller protected places aren’t shown.
499 places to go in Boston
Beaches, playgrounds, peaks, falls and more. Pick a kind.
Plus 25 beaches without a name on the map. Tap “Show all on map” to see them.
22 more playgrounds
306 playgrounds are on OpenStreetMap in all; the list shows named ones from the first 30.
2 more dog parks
Plus 15 dog parks without a name on the map.
16 boat launches without a name on the map.
41 scenic views are on OpenStreetMap in all; the list shows named ones from the first 30.
19 more peaks
Plus 21 picnic areas without a name on the map.
4 more community gardens
Plus 14 community gardens without a name on the map.
25 named trails and 26 lakes & rivers
15 more trails
240 miles of bike routes
Bike lanes are often missing from the map in smaller towns, so that number is likely low.
Includes school and college facilities, which aren’t always open to the public.
324 places on the National Register, 56 of them National Historic Landmarks
The country’s official list of places worth saving (National Park Service). The map also marks 88 historic points from OpenStreetMap: plaques, memorials and old buildings.
312 more on the History page.
The best walking months in Boston: May to September
NOAA’s 1991–2020 normals for the town and the daylight at its latitude. Outlined months have long days, highs of 59 to 86 °F and little rain for the place.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 9.4 | 10.5 | 11.8 | 13.3 | 14.6 | 15.3 | 15.0 | 13.9 | 12.4 | 11.0 | 9.7 | 9.1 |
| High (°F) | 37 | 39 | 46 | 57 | 67 | 77 | 82 | 81 | 74 | 62 | 52 | 42 |
| Rain (in) | 3.8 | 3.6 | 4.7 | 4.2 | 3.6 | 4.1 | 3.5 | 3.5 | 3.8 | 4.7 | 4.0 | 4.8 |
July is the driest month (3.5 in) and the warmest (highs of 82 °F). 4.8 inches fall in December, the wettest month. The climate in Boston →
Boston and its neighbors
Boston has the most mapped trails of the 8 towns around it. Tap a town to see its outdoors.
| Town | Conserved of land | Trail mi per sq mi | Park acres per 1,000 | Near a park ½ mile | Outdoors |
|---|---|---|---|---|---|
| Boston | 18% | 1.9 | 8 | 99%+ | A |
| Milton | 40% | 4.1 | 87 | 98% | A+ |
| Brookline | 20% | 2.4 | 7 | 99%+ | A |
| Cambridge | 15% | 1.7 | 5 | 99%+ | A |
| Winthrop Town | 18% | 3.2 | 9 | 99%+ | A |
| Dedham | 22% | 2.0 | 43 | 99%+ | A+ |
| Revere | 16% | 1.2 | 10 | 99%+ | A |
| Quincy | 35% | 4.5 | 34 | 99%+ | A+ |
The four inputs of the Outdoors grade, from the engine; shares are of land, not water.
Questions about parks and trails in Boston
Where can I hike in Boston?
The longest trail networks: Arnold Arboretum, 9.1 miles; Franklin Park, 8.2 miles; Spectacle Island, 5.3 miles; Allandale Woods, 2.9 miles. Each one is on the map above, with directions to the nearest trailhead or parking.
How much of Boston is conserved land?
18% of its land, against a typical 21% for a Massachusetts town and 4% nationally (PAD-US). Conserved doesn’t always mean open to visitors: easements are usually private land.
Are dogs allowed on Boston’s trails?
Arnold Arboretum and Franklin Park don’t have dog rules recorded on the map; check the signs at the trailhead.
Where can I bike in Boston?
240 miles of bike routes are on the map: 106 of painted or protected lanes, 89 of off-road paths and 45 of shoulders and shared lanes.
Is there public land near Boston?
66,837 acres of parks and open public land lie inside Boston or within 10 miles of it (PAD-US), 5,637 of them inside the city line.
How much outdoors does Boston have?
Ahead of 91% of U.S. towns on the Outdoors grade, #207 of 283 in Massachusetts. The grade combines the share of land that is conserved, miles of mapped trail per square mile of land, park acres per 1,000 residents and the share of residents within a half mile of a park. It’s a character grade, so it isn’t part of the overall grade. How it works.
Trail talk
Conditions, parking and favorite walks from Boston neighbors.
Where this page comes from
Conserved and public land: USGS Protected Areas Database of the United States (PAD-US), service updated July 2026. Parks, trails, playgrounds, beaches and other places: OpenStreetMap (© OpenStreetMap contributors, ODbL), map data as of 2026-10-28. Land and water area: Census 2025 Gazetteer. Residents near a park: 2020 Census blocks. National Register: National Park Service. How TownRatings grades the outdoors →