Description
3.5 mi. E of Chilkoot Inlet and 26 mi. SSE of Skagway, Coast Mts.
History
Named in 1920 by U.S. Coast and Geodetic Survey (USC&GS) for C. H. Sinclair who died in 1920 and who had 47 years of field service with the bureau. The name was published in 1924 on Chart 8303.