Lost River Range
 The Lost River Range is a group of high mountains located in central Idaho in the northwestern United States. It runs southeast for approximately 75 miles (121 km) from the Salmon River near the community of Challis to the Snake River Valley near Arco. To the west are the valleys of the Salmon and the Big Lost Rivers while to the east are the Little Lost River and Pashimeroi Valleys. The range starts at the east bank of the Salmon River at an elevation of about 5000 feet (1500 m).