Glaciation in central Idaho All photos by Jim Cash, Moscow High School. These pictures are from the Lost River, Pioneer and Seven Devils Mountains Glaciated valley cutting folded Paleozoic limestone, looking north near Doublesprings Pass, Lost River Range, Custer County Lateral and end moraines on west side of Double Springs Pass, Lost River Range, Custer County. Terraced outwash with terminal moraine from Double Springs Pass in background-looking southwest on east side of Pass, Lost River Range End moraine at Double Springs Pass-view looking south from north side of pass, toward Lost River Range Glacial valley of Boulder Creek. Devils Bedstead in center of view. Photo Taken from near Wildhorse Creek campground, Pioneer Mountains Old Hyndman Peak-glacial horn-head of Wildhorse Creek, Pioneer Mountains Lateral moraine along Wildhorse Creek, Pioneer Mountains Glacial polish at outlet end of Mirror Lake-Seven Devils Mountains. Greenstone basaltic rock showing glacial polish and striations below Sheep Lake, Seven Devils Mountains, Idaho County.