Eldorado River (alternate Eldorado Creek) is a waterway on the Seward Peninsula in the U.S. state of Alaska. It is situated 14 miles (23 km) west of Solomon. This river has its source within a few miles of Salmon Lake, from which it is separated by a low divide. It flows southeast through a broad gravel-filled valley for 30 miles (48 km) to Flambeau River before emptying into Safety Sound.[1] Its headwaters reach the limestones of the Nome series and much of its course lies in a chlorite-albite-schist belt.[2] The Eldorado River provides a southerly drainage into the Bering Sea.[3]