Sentinel Island is a small island in
Summit County, Colorado
Summit County is a county located in the U.S. state of Colorado. As of the 2020 United States census, 2020 census, the population was 31,055. The county seat and largest town is Breckenridge, Colorado, Breckenridge. Summit County comprises the ...
in the
Dillon Reservoir
Dillon Reservoir, sometimes referred to as Lake Dillon, is a large fresh water reservoir located in Summit County, Colorado, United States, south of I-70 and bordered by the towns of Frisco, Silverthorne, and Dillon. It is a reservoir for th ...
.
It appears on a 1970 USGS map of the area, along with
Silver Dollar Island and
Fishhook Island.
References
Landforms of Summit County, Colorado
Islands of Colorado
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