The Kings River is a major river of California. It arises in the Sierra Nevada, consisting of three forks. The Middle and South Forks start in Kings Canyon National Park, while the North Fork starts in the John Muir Wilderness. The South Fork flows in Kings Canyon: a spectacular 8000' deep glacial valley. The forks join in the foothills of the Sierra in Fresno County, where the river becomes an attraction for whitewater rafting (class 3 rapids). From that point, the Kings River flows about 125 miles to the Tulare Lake bed south of Stratford.