Esopus Creek is a tributary of the Hudson River, starting at Winnisook Lake on Slide Mountain. It flows across Ulster County to the Hudson River at Saugerties. The Esopus is noted for making an almost 270-degree turn around Panther Mountain, following a buried impact crater rim. It is famous for tubing, a sport of rafting down a river in an inner tube. Many tubers begin their trip at Phoenicia, New York, and head down the creek towards the Ashokan Reservoir at Olive, New York.