1
Sherwood Forest
Nature preserve
814 acres4.6 mi of trail
Red TrailRockledge TrailCanyon TrailBluff Trail
Dog rules not recorded
DirectionsTo the parking lot
Outdoors · Grantham
Grantham, NH parks, trails & bike paths
About 19% of Grantham is conserved land, roughly 3,343 acres. There are about 47 miles of mapped trails, and the biggest networks are in Sherwood Forest (4.6 mi), Grantham Town Forest (2.4 mi), and Sawyer Brook Headwaters (1 mi).
Conserved land, trails, parks and bike routes in Grantham, measured from OpenStreetMap and USGS data.
At a glance
Grantham outdoors
Conserved land
19%
3,343 of 17,845 acres
Trails
47 mi
1.7 mi per sq mi · 15 on conserved land
Parks & preserves
13
965 conserved acres per 1,000 residents
Bike routes
0.6 mi
0.4 mi lanes · 0.2 mi off-road paths
Conserved land is a share of the whole town area. Bike lanes are often missing from the map in smaller towns, so that number is likely low.
Map
Conserved land, trails & bike routes
Tap a number or a place below to zoom in© OpenStreetMap contributors · USGS PAD-US
Places to walk
Parks & preserves with trails
Ranked by mapped trail miles. Directions go to the nearest marked trailhead or public parking.
2
Grantham Town Forest
Managed by Town of Grantham
424 acres2.4 mi of trail
Croydon TurnpikeBrook Trail
Dog rules not recorded
No trailhead mapped yet
3
Sawyer Brook Headwaters
Managed by Ausbon Sargent Land Preservation Trust
381 acres1 mi of trail
Croydon Turnpike
Dog rules not recorded
No trailhead mapped yet
4
Henry Laramie Wildlife Management Area
Nature preserve
222 acres0.9 mi of trail
Butternut TrailCole Pond Trail
Dog rules not recorded
No trailhead mapped yet
5
Donas J. & Margaret Reney Memorial Forest
Managed by Society for the Protection of New Hampshire Forests
410 acres0.7 mi of trail
Dog rules not recorded
DirectionsTo the parking lot
6
William B. Ruger, Jr. Wildlife Management Area - North
Managed by NH Fish & Game
343 acres0.6 mi of trail
Croydon Turnpike
Dog rules not recorded
No trailhead mapped yet
7
Snow Mountain Conservation Area
Managed by Upper Valley Land Trust
76 acres0.4 mi of trail
Piasecki Way South Loop
Dog rules not recorded
No trailhead mapped yet
Website
All 13 parks & preserves
- Eastman Forest43 ac · 0.2 mi trail · Directions
- Leavitt Hill Wetland88 ac · 0.1 mi trail
- Fisher Lot30 ac · Directions
- Grantham Recreation Park24 ac
- Brookside Park21 ac · Directions
- Eastman Pond Island3 ac
Who protects the land
3,343 conserved acres
Who manages it, from PAD-US. Approximate, because parcels can overlap.
Conserved doesn't always mean open to visitors. 1,835 acres are conservation easements, which are usually private land. Public access isn't recorded for 16 of 20 parcels. The places listed above are parks and preserves people visit.
Biking & sports
Bike routes, courts & fields
- Painted or protected bike lanes0.4 mi
- Off-road bike paths0.2 mi
- Shoulders & shared lanes0.0 mi
Courts & fields
- Tennis13
- Baseball2
- Basketball2
Counts include school and college facilities, which aren't always open to the public.
Next door
Grantham and its neighbors
Towns whose outdoors data has been built so far.
| Town | Conserved | Trails | Parks & preserves |
|---|---|---|---|
| Grantham | 18.7% | 46.8 mi | 13 |
| Plainfield | 13.7% | 77.7 mi | 14 |
| Croydon | 8.9% | 27.2 mi | 3 |
| Springfield | 40% | 53.2 mi | 5 |
| Enfield | 26.8% | 46.6 mi | 14 |
Trail talk
Conditions & tips from neighbors
No recent posts about Grantham's trails yet. Muddy, icy, a bridge out, where to park: a quick post helps the next person.
Sources: trails, parks, preserves, courts and bike lanes © OpenStreetMap contributors (ODbL), map data as of 2026-09-28. Conserved land: USGS Gap Analysis Project, Protected Areas Database of the United States (PAD-US). Measured against the Census town boundary.
How we measure
"Trails" are OpenStreetMap paths, bridleways, public tracks and unpaved footways, plus footways inside a park or preserve or on a named trail route. Sidewalks are left out. Areas are counted on a 21.6-meter grid, so overlapping parcels count once. "Conserved" includes conservation easements, which protect land from development but are usually private property. Trailheads are the nearest marked trailhead, public parking lot or information board within about 150 meters of a preserve. Dog rules come from OpenStreetMap when someone has tagged them; otherwise we show what's typical for the land manager, or say the rules aren't recorded.