Hither Hills is a State Park on the South Fork of Long Island. On the South is the Atlantic Ocean, the West Nepeague S.P., the North Gardiner Bay and to the East, a collection of Country and Town Parks as well as a Nature Preserve. It’s unusual, in that you can ride your MTB everywhere inside it. There are old Indian ruins, old house foundations, an old graveyard. There’s a lot of history here.
There’s a large fresh pond inside it. So ride-wise, you’re never far from water. Ocean, Bay or Pond. Get overly sweated up and hop in for a dip. I sometimes go SCUBA diving nearby. There’s the wreck of a British Ship-of-the-Line (which I haven’t yet found), a WWII Seaplane ramp and other stuff.
There’s the ruins of a village. Looks like a terrain Park. Has a circuit over it like a Cyclocross course.
Hither Hills has a variety of surfaces to delight your wheels. Sand, woodland trails, some old roads, gravel, some boardwalk. There’s some ravines with heart thumping descents.
To get there, Take Route 27 along the Southern shore of Long Island. Park at the West Overlook. There,s a large trail Map and a holder of paper ones you take with you as you ride.
No red tape. There are admission fees to the Bathing Beach in the summer.
To access from the North, through the Town Park, you'll need an East Hampton Town Parking sticker.
More details can be found here: http://nysparks.state.ny.us/parks/122/details.aspx
CampingCamping is available on the Ocean side. So you can dump the wife and kids at the beach and head to the hills.