Much less well known than Valley Forge, Jockey Hollow was where Washington’s army spent the winter of 1777, following its victories in Trenton and Princeton. There’s a beautiful, Intermediate hike through some of the National Park that preserves the area, and part of the NJ Audubon Society sanctuary. It climbs a ridge, passes the camp site of the NJ Brigade, and descends into the headwaters of the Passaic River, here a small wild trout stream. (Driving time is about 1:15 from Trenton via 206/I-287; rated Intermediate for elevation change though the hike is fairly steep in spots)