AuSable Chasm is one of the most unique scenic spots in the entire Champlain Valley.  The AuSable River has carved a spectacular gorge here to expose a 455-ft thickness of the Keeseville Member of the Potsdam Sandstone.

     The chasm is located 1.3 miles north of Keeseville, NY, where U.S. Route 9 crosses the AuSable River.  The chasm is a privately owned attraction and fees are charged for access to the walking paths and the raft trip through the lower end of the gorge.