1
Surry Mountain Preserve
Managed by The Nature Conservancy
1,166 acres7 mi of trail
Dogs usually not allowedTypical for Nature Conservancy preserves. Check posted rules
DirectionsTo the parking lot
Outdoors · Gilsum
Gilsum, NH parks, trails & bike paths
About 30% of Gilsum is conserved land, roughly 3,143 acres. There are about 22 miles of mapped trails, and the biggest networks are in Surry Mountain Preserve (7 mi), John and Rosemarie Calhoun Family Forest (0.9 mi), and Bear's Den Natural Area (0.9 mi).
Conserved land, trails, parks and bike routes in Gilsum, measured from OpenStreetMap and USGS data.
At a glance
Gilsum outdoors
Conserved land
30%
3,143 of 10,622 acres
Trails
22 mi
1.3 mi per sq mi · 11 on conserved land
Parks & preserves
7
named on the map
Bike routes
0.0 mi
0.0 mi lanes · 0.0 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
John and Rosemarie Calhoun Family Forest
Managed by Monadnock Conservancy
198 acres0.9 mi of trail
Dog rules not recorded
DirectionsTo the parking lot
3
Bear's Den Natural Area
Managed by New Hampshire Division of Forests and Lands
96 acres0.9 mi of trail
Orange Dot
Dog rules not recorded
DirectionsTo the parking lot
4
Andorra Forest
Managed by Society for the Protection of NH Forests
88 acres
Dog rules not recorded
No trailhead mapped yet
All 7 parks & preserves
- Maynard Forest79 ac · 0.2 mi trail
- Emerson Brook Forest32 ac
- Alstead Conservation Land1 ac
Who protects the land
3,143 conserved acres
Who manages it, from PAD-US. Approximate, because parcels can overlap.
Conserved doesn't always mean open to visitors. 1,125 acres are conservation easements, which are usually private land. Public access isn't recorded for 21 of 25 parcels. The places listed above are parks and preserves people visit.
Biking & sports
Bike routes, courts & fields
- Painted or protected bike lanes0.0 mi
- Off-road bike paths0.0 mi
- Shoulders & shared lanes0.0 mi
Courts & fields
- Tennis1
Counts include school and college facilities, which aren't always open to the public.
Next door
Gilsum and its neighbors
Towns whose outdoors data has been built so far.
Trail talk
Conditions & tips from neighbors
No recent posts about Gilsum'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 20-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.