The river was first explored and named by Charles McLennan, who, with dog team and Eskimo assistants, made a trip into the region from Shishmaref Inlet in May, 1900. McLennan was probably the first European to reach the hot springs on Spring Creek, a tributary of this river. He staked a number of claims along this creek, and prepared a map of the region, a copy of which was received in Washington in March, 1901. In September, 1901, there was a small settlement at the hot springs. Gold was found on a number of the tributaries of the middle fork of this river, and in September 1901, a number of miners were preparing to winter in the neighborhood, the principal settlement being at the hot springs.[2]