The Bear 100M

The Bear 100 Mile Endurance Run is an ultramarathon that traverses the Wasatch and Bear River Ranges west of Bear Lake, from Logan, Utah to Fish Haven, Idaho. With 21,986 ft (6,701 m) of climb and an average elevation of 7,700 ft (2,300 m), it is one of the more difficult ultramarathons. Even so, runners of all skill are attracted to it, largely because of its 36-hour time limit and laid-back attitude. 

The Bear 100 is part of the "Rocky Mountain Slam," which a runner completes if s/he finishes the Hardrock 100 plus three of four other races in the Rocky Mountains: Leadville Trail 100, the Bear 100 Mile Endurance Run, the Bighorn 100, or the Wasatch Front 100 Mile Endurance Run. The award is presented at and hosted by the Bear 100 Mile Endurance Run, as this is the final run in the series.