1
Clinton Wildlife Management Area
Nature preserve
1,921 acres3.1 mi of trail
Highlands TrailSpruce Run Trailhead
Dog rules not recorded
DirectionsTo Spruce Run Parking Lot
Outdoors · Union
Union, NJ parks, trails & bike paths
About 39% of Union is conserved land, roughly 5,145 acres. There are about 7.7 miles of mapped trails, and the biggest networks are in Clinton WMA (3.1 mi), Spruce Run Recreation Area (2.6 mi), and Union Furnace Preserve (0.8 mi).
Conserved land, trails, parks and bike routes in Union, measured from OpenStreetMap and USGS data.
At a glance
Union outdoors
Conserved land
39%
5,145 of 13,123 acres
Trails
7.7 mi
0.4 mi per sq mi · 8 on conserved land
Parks & preserves
4
800 conserved acres per 1,000 residents
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
Spruce Run Recreation Area
Nature preserve
412 acres2.6 mi of trail
Highlands Trail
Dog rules not recorded
DirectionsTo the trailhead
3
Union Furnace Preserve
Managed by Hunterdon County
163 acres0.8 mi of trail
Highlands Trail
Dog rules not recorded
DirectionsTo the parking lot
4
Hoffman Park
Managed by Hunterdon County
352 acres0.3 mi of trail
Owl's Roost
Dog rules not recorded
DirectionsTo the parking lot
Who protects the land
5,145 conserved acres
Who manages it, from PAD-US. Approximate, because parcels can overlap.
Conserved doesn't always mean open to visitors. 731 acres are conservation easements, which are usually private land. Public access isn't recorded for 10 of 80 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
- Soccer8
- Baseball6
- Tennis4
- Basketball3
- Beach volleyball2
Counts include school and college facilities, which aren't always open to the public.
Nearby
Union and its neighbors
Towns whose outdoors data has been built so far.
Trail talk
Conditions & tips from neighbors
No recent posts about Union'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 21.7-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.