Cullbreath 1942 45? Mad River Rock S. Van Dusen River W. 13087 Highway Number Mad River Looking south from 4500' on South Fork NH. 5 miles N. Mad River Rock, Trinity Co., California Note snow line at 4000' on ridges to the south. Many of the open slopes shown on the north facing slope of the mountain separating the Mad River and the Van Dusen Rivers are covered with black. The other open places are covered with short grass