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.
References
- ^ U.S. Geological Survey Geographic Names Information System: Sentinel Island
- ^ United States Geological Survey (1970). "Frisco Quadrangle, Colorado" (Map). United States Department of the Interior Geological Survey. 1:62500.
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