There are several rivers named Salmon River in Alaska.
Map of Salmon River, Alaska, USA
Other Salmon Rivers in Alaska include one on Chichagof Island (name may not be in current use), one arising in Glacier Bay National Monument and running through Gustavus, Alaska, one emptying into Kuskokwim Bay, and one a tributary of the Aniak River. The name is also listed as a synonym for several other rivers and is applied to a distributory watercourse of the South Fork, Kuskokwim River.
References
Salmon River (Alaska) Wikipedia(Text) CC BY-SA