Nickerson is roughly 1,900 acres of pine, oak and pond on the bay side of Brewster, and it exists because of a donation rather than a purchase. The land was the Nickerson family estate. In 1934 Addie Nickerson gave the portion south of Route 6A to the Commonwealth as a state forest park, in memory of her husband Roland and their son Roland Jr, and the Civilian Conservation Corps built much of the road and trail infrastructure that is still in use.
What makes it worth a visit rather than just a place to camp is the water. Eight kettle ponds sit within the park: Cliff, the largest at about seven tenths of a mile across, Little Cliff, Flax, Higgins, Ruth, Keeler's, Eel and Triangle. Each is a hole left by a block of glacial ice that was buried in outwash and then melted, roughly twelve thousand years ago. They have no inflowing streams and no outflow. Their water is groundwater and rainfall, which is why it is clear, why it is soft, and why it warms in the shallows and stays startlingly cold once you swim out over the drop.
For a visitor from the Outer Cape, that last point is the entire sales pitch. The Atlantic off Wellfleet in July will take your breath away. Flax Pond will not. On a cool cloudy day the ponds are the better swim on this peninsula, and on a hot day they are the one families keep returning to.
The park holds over 400 campsites plus yurts, which makes it the Cape's only large public campground and one of the hardest bookings in Massachusetts. Summer weekends are gone within minutes of the reservation window opening.
There are about eight miles of paved bike trail inside the park, connected directly to the Cape Cod Rail Trail at the gate, plus hiking and bridle paths through white pine, spruce and a cedar swamp. Cliff, Flax, Little Cliff and Higgins are stocked with trout.