Once property of Brookhaven National Laboratory and former military installation called Camp Upton, Brookhaven State Park is 1,638-acres and is part of the central core of the Long Island Pine Barrens. The Park runs along the east side William Floyd Parkway north of Whiskey Road, and between NY 25 and NY 25A. For the avid hiker, the park features The Brookhaven Trail, which heads south through the park and hooks up with the white-blazed Paumanok Path. In addition to various oak-pine habitats this park also contains scattered wetlands. Some of Brookhaven's foliage includes flowering dogwood, wild geranium, Christmas fern and pitch pine. Coastal plain ponds also lie within the park boundaries.

First time hiking this trail. Took the green trail. The sign at the trailhead says 5.3 miles. My tracker said 4.9. Fairly flat, a couple of rolling hills. There is a good amount of sand to walk through, sometimes uphill. I started at 1:30pm (Saturday) and was the only one there. Did pass a woman on horseback, though. There are a couple of small ponds along the way, one of which was almost dried up. Overall it was a good hike.

The parking lot is only open on Saturday and Sunday from 8am-4pm. Don't get locked in!!!

Sand in the middle of the woods. Some good little hills. Free. Watch out for crazies riding around on quads.