3. Drive 45 miles from Mackay to Trail Head down Hwy 93 to Antelope Road Smiley Mountain 11,508 ft Smiley Creek Right Fork Iron Bog Lake Hike 1,467 elevation gain 9,067 ft. Glacier Iron Bog Lake Left Fork Iron Bog Creek Iron Bog Lake Hike 7,600 feet Latitude 43.65.16 and Longitude 113.84.59 Trail Head