It is about 25.1 miles ( 40.4 km ) long , all within Del Norte County .
It flows through the Rogue River -- Siskiyou National Forest , Six Rivers National Forest , and Jedediah Smith Redwoods State Park .
It is about 25.1 miles ( 40.4 km ) long , all within Del Norte County , and it flows through the Rogue River -- Siskiyou National Forest , Six Rivers National Forest , and Jedediah Smith Redwoods State Park .