The North Fork Salmon River is a river in Siskiyou County, California. It joins with the South Fork Salmon River at Forks of Salmon to form the Salmon River, a major tributary of the Klamath River. Originating at English Lakes near English Peak in the Salmon Mountains, the North Fork drains about of rugged, forested terrain. The entire river is located within the Klamath National Forest, with the headwaters located in the Marble Mountain Wilderness.