The rushing Canyon Creek enters the river originating high on the slopes of Mount Adams. A few miles down the North Fork Cispus enters the main branch about from its start. From here on, the Cispus River flows westerly, passing campgrounds and trails in the Gifford Pinchot National Forest. Two tributaries, Yellowjacket and McCoy Creeks, flow into the river from the south about midway though its course. Beyond here, the river passes beneath Tower Rock, a prominent quartz diorite monolith on the south side of the river. Soon after this the river leaves the Gifford Pinchot National Forest and enters the Weyerhaeuser Cowlitz Tree Farm. The Cispus River ends its course entering the Cowlitz River at Lake Scanewa, just upstream from Cowlitz Falls and Riffe Lake.