Description
Twelvemile Island is located in the Yukon River, 12 mi. SE of Fort Yukon, Yukon Flats.
History
Local name reported by U.S. Geological Survey (USGS) in 1956; so named because the island is 12 miles upstream from Fort Yukon; the island was shown on Edwards' Track Chart of the Yukon in 1899 as "Seventeenmile Island."