at "
Frustration Falls",
Salmon River Gorge. The ridges in the Salmon–Huckleberry Wilderness belong to the
Western Cascades (Old Cascades), a broad volcanic mountain range that erupted 10 million years before the High Cascades. Devils Peak and Salmon Butte are likely remnants of once-tall volcanoes, but have been reduced to ridges by the millennia of ice and water erosion. The wilderness contains several U-shaped valleys formed by
glacial activity. The drainages of the
South Fork Salmon River and
Eagle Creek are found in the Salmon–Huckleberry Wilderness, and
volcanic plugs, pinnacles, and cliffs distinguish the area's sharply dissected ridges. Much of the water in the area runs off Huckleberry Mountain in the northern portion of the Wilderness. To the south is Salmon Butte, a
butte that can be hiked via a trail to the top. ==Vegetation==