Sentinel Island (Colorado)
Sentinel Island is a small island in Summit County, Colorado in the Dillon Reservoir. It appears on a 1970 USGS map of the area, along with Silver Dollar Island and Fishhook Island.
Sentinel Island is a small island in Summit County, Colorado in the Dillon Reservoir. It appears on a 1970 USGS map of the area, along with Silver Dollar Island and Fishhook Island.