The Former Marmot Dam Site is a developed day-use recreation area on the Sandy River (at river mile 30) featuring improved parking, picnic sites, barbecue grills, and vault restrooms; vehicle access is currently gated with a 1/4 mile walk required from temporary parking.

The site serves as a river access point for paddlers and is notable as the location of Oregon's largest dam removal (completed in 2007), with future interpretive signage planned to explain the restoration efforts.

Commercial and competitive use requires a permit from the BLM.