This is Clark Canyon Reservoir. It's pretty good-sized. As you can see, still smoky as it was when I came up on August 2.

Clark Canyon Reservoir is the site of Camp Fortunate, one of the more significant spots along the Lewis and Clark Trail. It was at Camp Fortunate that the Lewis and Clark expedition met the Limhi Shoshoni Tribe, and cached their canoes and a stash of supplies for the return trip. Sacagawea was reunited with her people here. This reservoir, with 4,935 surface acres and 17 miles of shoreline, offers good fishing for rainbow and brown trout