State Park
Washington Rock State Park
- Status
- Status not posted
- Entrance fee
- Not posted
- Day-use reservations
- None mentioned
- Dogs
- Not stated — check with park
- Camping
- None listed
- Official site
- dep.nj.gov
Official page last checked Oct 29, 2026. How we keep this current
Overview
In Somerset County, in Dunellen, Washington Rock State Park covers about 50 acres.
Things to do include biking, picnicking, and hiking.
Things to do
PicnickingHikingBiking
Trails
| Trail | Length | Difficulty | Notes |
|---|---|---|---|
| Paved Path | 0.28 mi | Easy | Blaze: UnmarkedHikingBikingPaved surfaceAccessible |
| Orange Mountain Trail | 0.17 mi | Easy | Blaze: OrangeHikingNatural surface |
| Monument Path | 0.11 mi | Easy | Blaze: UnmarkedHikingPaved surfaceAccessible |
Trail descriptions from the park
Paved Path – 0.28 mi – Easy – hiking/biking
Orange Mountain Trail – 0.17 mi – Easy – hiking
Monument Path – 0.11 mi – Easy – hiking
Amenities
Facilities
- Restrooms
- Picnic areas
- Parking
✓ listed by the park · ✕ the park says it is not available. Anything not shown here isn’t mentioned by the official source — that means unknown, not unavailable.
Getting there
- Nearest town
- Dunellen
- Coordinates
- 40.6133, -74.4733
Entrances
- Park Entrance
Nearby state parks
Edison State Park
7.8 mi southeast (straight line)
Wallace House and Old Dutch Parsonage Historic Site8.4 mi west (straight line)
Six Mile Run Reservoir Site10.9 mi southwest (straight line)
Proprietary House Historic Site13.1 mi southeast (straight line)
Clay Pit Ponds State Park Preserve13.8 mi east (straight line) · New York
Boxwood Hall Historic Site14.2 mi east (straight line)
Pigeon Swamp State Park15.6 mi south (straight line)
Cheesequake State Park16.5 mi southeast (straight line)
Sources and freshness
- New Jersey State Parks, Forests & Historic Sites — park page — last checked Oct 29, 2026
- NJDEP Open Space (State Owned) Facility layer, filtered to LAND_MANAGER 'State Parks, Forests and Historic Sites' with a FACILITY_URL park page
- Wikidata
- USGS PAD-US 4.1 (boundary and acreage)
- Photo: Washington.Rock.jpg — Public domain (released by the author), User:Ekem
“Last checked” is when our system last read the official source. No change has been detected since this page was first published. Hours, fees and rules can change without notice — confirm with the park before you go. Methodology