Caribou Mountains 1-11 Pictures Portneuf Valley (2002-04-08) Looking toward the Hudspeth Cutoff Caribou Mountains (2002-04-08) Rock Formation (2002-04-08) Rock Formation (2002-04-08) Portneuf Loop (2002-04-08) Portneuf Loop (2002-04-08) State 34 (2002-04-08) Highway 34 runs along Bear River, winding through low hills between Preston and US30. State 34 (2002-04-08) Lava Hot Springs (2002-04-08) Another shot of the canyon sides above Lava Hot Springs. Hudspeth s cutoff (2002-04-08) Malad, Idaho (2007-10-24) Malad, Idaho sits at the base of the Elk Horn Peak area of the Caribou Mountains 1-11 Pictures The Caribou Mountains are in southern Idaho, just east of Pocatello. Context: Mountains Interstate 15 (88 pictures) The Caribou Mountains are east of I15 in southeast Idaho.