Institute Woods
Nature preserve
289 acres5.5 mi of trail
Pipeline TrailMiddle TrailFar TrailFounders' Walk+1
Dog rules not recorded
Directionsto the parking lotWebsite ↗
Photo: ajay_suresh · CC BY 4.0A+Outdoors
Outdoors in Princeton
Princeton has 48 miles of mapped trails, 2.7 for every square mile of land
20% of Princeton’s land is conserved, about 2,343 acres. 99% of residents live within a half mile of a park. 2,029 acres are parks and preserves, 66 per 1,000 residents.
Among the top 1% of U.S. towns · #23 of 468 in New Jersey. What drives it
Conserved land
20%
2,343 acres · of 17.9 sq mi of land
Trails
48 mi
2.7 per sq mi of land
Park land
2,029 ac
66 acres per 1,000 residents
Near a park
99%
of residents within ½ mile
Bike routes
30 mi
0.6 mi lanes · 19 mi paths
Highest peak
302 ft
Rocky Hill
Lakes & rivers
3
2 boat launches
What kind of outdoors town is Princeton?
Read from the map. The page puts what stands out first.
Outdoors grade
How much outdoors does Princeton have?
On conserved land, trails, park land and how close residents live to a park, Princeton is among the top 1% of U.S. towns, #23 of 468 in New Jersey. All four inputs are above most U.S. towns; trail miles rank highest, park acres per resident lowest.
A+
OutdoorsA character grade: shown, never part of Princeton’s overall grade.
Conserved land20% of the land · typical NJ town 11% · U.S. 4%ATrails2.7 miles of mapped trail per square mile of land (48 mi) · NJ 0.7 · U.S. 0.4A+Park land66 acres of park per 1,000 residents (2,029 acres) · NJ 25 · U.S. 13A−Parks close to home99% of residents within a half mile of a park · NJ 98% · U.S. 72%A
All U.S. towns we grade (21,298)Among the top 1%
LessMore
New Jersey towns of 2,500+ (468)Ahead of 95%
New Jersey towns conserve more land than most (a typical one, 11%; the U.S., 4%), so Princeton’s 20% is ahead of 70% of New Jersey towns, while its trails per square mile lead 95% of them.
How sure. Graded on any three of the four inputs instead, the letter would still be A+. Trails and many small parks come from OpenStreetMap, mapped by volunteers, so coverage varies from town to town; the half mile is a straight line from each census block, so a river or highway in the way isn’t counted against it.
PAD-US, OpenStreetMap (© OpenStreetMap contributors), Census 2025 Gazetteer and 2020 blocks; details in Sources below. How TownRatings grades the outdoors →
The map
Conserved land, trails & bike routes
Tap a number to zoom to a park. Tap a layer to hide it.
Easements protect land from building but are usually private.© OpenStreetMap contributors · USGS PAD-US
Places to walk
Pick a walk
The longest trail network is Institute Woods, with 5.5 miles. Directions go to the nearest trailhead or public parking.
Herrontown Woods
Nature preserve
142 acres4.5 mi of trail
RedYellowWhiteBlue+1
Dog rules not recorded
Directionsto Herrontown Woods Parking
Woodfield Reservation
Nature preserve
134 acres2.7 mi of trail
Yellow / Great Road-Stewart TrailBlur / Scout LoopWhite / South TrailRed / Pond View Spur+1
Dog rules not recorded
Directionsto the parking lot
Billy Johnson Mountain Lakes Nature Preserve
Nature preserve
76 acres2.5 mi of trail
Dog rules not recorded
Directionsto the parking lot
Delaware and Raritan Canal State Park
Managed by New Jersey Division of Parks and Forestry
152 acres2.1 mi of trail
Delaware & Raritan Canal Towpath
Dogs on leash
Directionsto the trailheadWebsite ↗
Autumn Hill Reservation
Nature preserve
76 acres2 mi of trail
Unmarked
Dog rules not recorded
Directionsto the parking lot
Community Park North
Nature preserve
70 acres1.3 mi of trail
Yellow trail
Dog rules not recorded
Directionsto the parking lot
Public Open Space
Nature preserve
59 acres1.3 mi of trail
Dog rules not recorded
Directionsto the parking lot
All 28 parks & preserves
Institute Woods289 acres · 5.5 mi of trail
DirectionsHerrontown Woods142 acres · 4.5 mi of trail
DirectionsWoodfield Reservation134 acres · 2.7 mi of trail
DirectionsBilly Johnson Mountain Lakes Nature Preserve76 acres · 2.5 mi of trail
DirectionsDelaware and Raritan Canal State Park152 acres · 2.1 mi of trail · New Jersey Division of Parks and Forestry
DirectionsAutumn Hill Reservation76 acres · 2 mi of trail
DirectionsCommunity Park North70 acres · 1.3 mi of trail
DirectionsPublic Open Space59 acres · 1.3 mi of trail
DirectionsJohn Witherspoon Woods41 acres · 1.2 mi of trail
DirectionsGreenway Meadows49 acres · 1.1 mi of trail
DirectionsPrinceton Battlefield State Park82 acres · 0.9 mi of trail · New Jersey Department of Environmental Protection
All Saints Preserve35 acres · 0.9 mi of trail · D&R Greenway Land Trust
DirectionsCharles H. Rogers Wildlife Refuge38 acres · 0.5 mi of trail
Farmview Fields20 acres · 0.5 mi of trail
Hilltop Park8 acres · 0.4 mi of trail
Harrison Street Park4 acres · 0.1 mi of trail
DirectionsVan Dyke Wright Park32 acres
DirectionsBarbara Smoyer Park27 acres
DirectionsCommunity Park South20 acres
DirectionsGrover Park8 acres
DirectionsLake Field3 acres
DirectionsQuarry Park3 acres
DirectionsCannon Green1 acres
Palmer Square Green1 acres
DirectionsLawrence Circle Park1 acres
DirectionsPotts Park1 acres
Turning Basin Park1 acres
DirectionsSigmund Park1 acres
DirectionsWho protects it
2,343 conserved acres
20% of Princeton’s land. Who manages Princeton’s conserved land, from the USGS Protected Areas Database. Approximate, because parcels can overlap.
County1,140 ac
Town or city981 ac
Land trusts & nonprofits636 ac
Other state land256 ac
State natural resources200 ac
Other or Unknown Local Government71 ac
Private owners7 ac
Agricultural Easement · 1,045 acLocal Conservation Area · 787 acLocal Park · 539 acOther Easement · 315 acState Park · 223 ac
Good to know
Conserved doesn’t always mean open to visitors. 409 acres are conservation easements, usually private land. Public access isn’t recorded for 3 of 93 parcels. The walks above are places people visit.
The biggest protected parcels
| Parcel (PAD-US) | Managed by | Acres | Public access |
|---|---|---|---|
| Institute Woods Private Agricultural | Land trusts & nonprofits | 262 | Closed |
| Woodfield Reservation Local Conservation Area | Town or city | 261 | Open |
| Stony Brook Local Conservation Area | Town or city | 150 | Open |
| Delaware and Raritan Canal State Park State Park | Not recorded | 143 | Open |
| Herrontown Woods Local Resource Management Area | County | 140 | Open |
| Princeton Battlefield State Park State Park | State natural resources | 80 | Open |
| Autumn Hill Reserve Local Conservation Area | Town or city | 75 | Open |
| Central Stony Brook Greenway Private Conservation | Land trusts & nonprofits | 73 | Closed |
| Mountain Lakes Local Park | Town or city | 69 | Open |
| Van Dyke Wight Local Park | Not recorded | 68 | Open |
5 smaller protected places aren’t shown.
Things to do
30 places to go in Princeton
Beaches, playgrounds, peaks, falls and more. Pick a kind.
Public pools in Princeton
Nassau Swim Club
DirectionsNassau Swim Club
DirectionsPlus 1 public pool without a name on the map. Tap “Show all on map” to see it.
Playgrounds in Princeton
Maggie's PlaygroundIn Quarry Park
DirectionsMarquard Park
DirectionsPlus 20 playgrounds without a name on the map. Tap “Show all on map” to see them.
Boat launches in Princeton
2 boat launches without a name on the map.
Scenic views in Princeton
2 scenic views without a name on the map.
Peaks in Princeton
Rocky Hill302 ft elevation
DirectionsTrails & water
25 named trails and 3 lakes & rivers
Named trails
Open to bikes · 3.7 miHorses · 2.2 miUnpaved · 14.7 mi
Delaware & Raritan Canal Towpath2.2 mi
Red1.3 mi
Stony Brook Trails1.3 mi
Pipeline Trail1.1 mi
Ettl Farm Trail1.1 mi
All Saints Trail0.9 mi
Yellow / Great Road-Stewart Trail0.9 mi
Yellow0.7 mi
Middle Trail0.5 mi
Far Trail0.5 mi
15 more trails
Blur / Scout Loop
0.5 miFounders' Walk
0.5 miWhite
0.4 miWhite / South Trail
0.4 miNature Trail
0.4 miRiver's Edge Trail
0.4 miUnmarked
0.4 miMarsh Trail
0.4 miBlue
0.4 miNear Trail
0.3 miRed / Pond View Spur
0.3 miPurple
0.3 miFool's Trail
0.3 miGreen / Drake's Corner Spur
0.2 miOlden Trail
0.2 miLakes & rivers tap for directions
Biking & sports
30 miles of bike routes
Bike lanes are often missing from the map in smaller towns, so that number is likely low.
0.6 mi
painted or protected bike lanes
19 mi
off-road bike paths
11 mi
shoulders & shared lanes
Delaware & Raritan Canal TowpathBike route
2.2 mi9/11 National Memorial Trail (New Jersey thru route)Bike route
2.2 miEast Coast Greenway (NJ South)Bike route
2.2 miCourts & fields
117Tennis
25Basketball
25Baseball
23Soccer
19Golf
6Football
3Beach volleyball
2Pickleball
Includes school and college facilities, which aren’t always open to the public.
History along the way
History →20 places on the National Register, 9 of them National Historic Landmarks
The country’s official list of places worth saving (National Park Service). The map also marks 5 historic points from OpenStreetMap: plaques, memorials and old buildings.
★
Princeton Battlefield -Stony Brook Village Historic DistrictNational Historic Landmark · District · listed 1989
About itDrumthwacketBuilding · listed 1975
About itTusculumBuilding · listed 1978
About itKingston Mill Historic DistrictDistrict · listed 1986
About it8 more on the History page.
When to get out
The best walking months in Princeton: April to June and August
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) | 9.6 | 10.6 | 11.8 | 13.2 | 14.4 | 15.0 | 14.8 | 13.8 | 12.4 | 11.0 | 9.9 | 9.3 |
| High (°F) | 40 | 43 | 51 | 63 | 73 | 82 | 86 | 85 | 78 | 66 | 55 | 45 |
| Rain (in) | 3.5 | 2.7 | 4.1 | 3.7 | 4.0 | 4.4 | 5.1 | 4.3 | 4.2 | 4.2 | 3.3 | 4.3 |
February is the driest month (2.7 in) and July the warmest (highs of 86 °F). 5.1 inches fall in July, the wettest month. Summer highs reach 86 °F, too hot for the outline. The climate in Princeton →
Next door
Princeton and its neighbors
Tap a town to see its outdoors.
Hopewell Township96 miFranklin Township58 miPrinceton48 miWest Windsor Township40 miMontgomery Township27 miLawrence Township27 miPlainsboro Township8.6 miKingston3.9 mi
| Town | Conserved of land | Trail mi per sq mi | Park acres per 1,000 | Near a park ½ mile | Outdoors |
|---|---|---|---|---|---|
| Princeton | 20% | 2.7 | 66 | 99% | A+ |
| Montgomery Township | 27% | 0.8 | 165 | 99% | A+ |
| West Windsor Township | 28% | 1.6 | 158 | 99%+ | A+ |
| Kingston | — not graded: under 1,000 residents or part of its town | ||||
| Lawrence Township | 22% | 1.2 | 78 | 91% | A+ |
| Franklin Township | 26% | 1.3 | 111 | 96% | A+ |
| Plainsboro Township | 28% | 0.7 | 72 | 99% | A+ |
| Hopewell Township | 35% | 1.7 | 461 | 79% | A+ |
The four inputs of the Outdoors grade, from the engine; shares are of land, not water.
Questions about parks and trails in Princeton
Where can I hike in Princeton?
The longest trail networks: Institute Woods, 5.5 miles; Herrontown Woods, 4.5 miles; Woodfield Reservation, 2.7 miles; Billy Johnson Mountain Lakes Nature Preserve, 2.5 miles. Each one is on the map above, with directions to the nearest trailhead or parking.
How much of Princeton is conserved land?
20% of its land, against a typical 11% for a New Jersey town and 4% nationally (PAD-US). Conserved doesn’t always mean open to visitors: easements are usually private land.
Are dogs allowed on Princeton’s trails?
OpenStreetMap records dogs as welcome at Delaware and Raritan Canal State Park (on leash). For the rest, check the signs at the trailhead.
Where can I bike in Princeton?
30 miles of bike routes are on the map: 0.6 of painted or protected lanes, 19 of off-road paths and 11 of shoulders and shared lanes. Named routes: Delaware & Raritan Canal Towpath, 9/11 National Memorial Trail (New Jersey thru route) and East Coast Greenway (NJ South).
Is there public land near Princeton?
57,875 acres of parks and open public land lie inside Princeton or within 10 miles of it (PAD-US), 2,029 of them inside the town line.
How much outdoors does Princeton have?
Among the top 1% of U.S. towns on the Outdoors grade, #23 of 468 in New Jersey. 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 Princeton neighbors.
Share a tip
Sources
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 →