The Satsop River is located in the lower section of the Olympic Peninsula. The river has three significant forks (West, East, and Middle) that are longer then the main stem of the Satsop River. The river empties into the Chehalis River just after it crosses under U.S. Route 12. The river is known for its coho salmon around October and November and then winter steelhead in February and March. Side drifting and back-trolling are popular techniques and the East fork below Shafer State park are one of the more popular spots on this river. Ideal flow for fishing is around 3000 cfs.