🌤 Weather at Wallace House by season
| Spring | Summer | Fall | Winter |
|---|---|---|---|
| 27–72 °F | 56–86 °F | 31–77 °F | 19–43 °F |
Each range runs from the coldest monthly average low to the warmest monthly average high in that season (1991-2020 climate normals), measured at Somerville 4 NW, 4 mi away, elevation 134 ft. Conditions at the park can differ from the station, especially where elevation differs — check a forecast before you go.
New Jersey’s Revolutionary War Headquarters — General Washington’s Winter Quarters 1778-1779, Georgian Architecture, Somerville Historic District, Wallace House and Old Dutch Parsonage State Historic Site, Somerset County New Jersey
Wallace House is a state historic site in Somerville, Somerset County, New Jersey, part of the Wallace House and Old Dutch Parsonage State Historic Site. This Georgian-style residence served as General George Washington’s headquarters during the winter of 1778-1779, while the Continental Army was encamped at nearby Middlebrook. The site features the restored 18th-century house with period furnishings, guided tours interpreting Washington’s stay and the Revolutionary War in New Jersey, the adjacent Old Dutch Parsonage (a separate historic building), and connections to key Revolutionary War events.
Washington’s Winter Headquarters
Built in 1778 by John Wallace, a prosperous Philadelphia merchant, the house was one of the finest residences in the area when General Washington chose it as his headquarters for the winter encampment of 1778-1779. Washington and his wife Martha occupied the house from December 1778 through June 1779, during a critical period of the Revolutionary War. The Middlebrook encampment was strategically located in the Watchung Mountains, providing a defensive position from which Washington could monitor British movements in New Brunswick and New York.
Notable Revolutionary War Connections
During Washington’s stay at Wallace House, several significant events occurred. The house hosted visits from prominent Revolutionary figures including Alexander Hamilton, the Marquis de Lafayette, and Henry Knox. It was during this period that Washington first received intelligence about Benedict Arnold’s shifting loyalties and made crucial decisions about troop movements that shaped the course of the war.
Visitor Information
The Wallace House and Old Dutch Parsonage offer guided tours interpreting 18th-century life and the Revolutionary War in New Jersey. The house has been restored with period-appropriate furnishings reflecting its appearance during Washington’s occupancy. Tours are typically available Wednesday through Sunday, though it is recommended to call ahead to confirm hours. The adjacent Old Dutch Parsonage (built 1751) provides additional context about colonial life in the region.
Frequently Asked Questions
Is there an admission fee?
Admission to Wallace House and the Old Dutch Parsonage is typically free, though donations are welcomed.
When did Washington stay at Wallace House?
Washington used the house as his headquarters from December 1778 through June 1779 during the Middlebrook winter encampment.
Wildlife & Nature
Wallace House — George Washington’s headquarters during the winter of 1778-1779 (the winter after Valley Forge) while the Continental Army was encamped at Middlebrook. The 1770s Georgian house is remarkably well-preserved. Songbirds inhabit the heritage garden.
Nearby Attractions
Somerville — adjacent. Old Dutch Parsonage — adjacent. Duke Farms — 5 miles west. Washington Rock SP — 10 miles east.
Keep exploring: The closest neighbors are Old Dutch Parsonage (a short drive away) and White Oaks (a short drive away).
🐾 Dogs & Pets at Wallace House
- Pets allowed? statewide rule
- Pets are allowed in NJ state parks and forests on leash but are prohibited from buildings, swimming beaches and non-designated campsites.
- Leash rule statewide rule
- Leash 6 feet or less, with the pet under physical control at all times.
- Beaches & swim areas statewide rule
- Pets are prohibited from swimming beaches and swimming waters statewide.
- Cabins & lodging statewide rule
- Pets are prohibited from cabins/lodging; the Pet Friendly Camping Program designates campsites at 13 areas (e.g. Round Valley all sites, Allaire 1-8, Bass River 1-85, Stokes 101-137) for up to two dogs or cats per permit.
- Pet fees statewide rule
- $5.00 per night additional charge for a pet-friendly campsite; no day-use pet fee.
- Statewide exceptions statewide rule
- Pet Friendly Camping requires current rabies vaccination with written proof at check-in; caged birds/reptiles only allowed inside RVs.
Are dogs allowed at Wallace House?
Pets are allowed in NJ state parks and forests on leash but are prohibited from buildings, swimming beaches and non-designated campsites. Individual parks can post stricter rules — check signage on arrival.
Rules verified July 2026 via dep.nj.gov. More: New Jersey state parks guide · Dog rules in all 50 states compared
Park Location
Plan your gear for Wallace House
From our editorial guides, matched to this park’s activities:
