Cascade Crest 100

Cascade Crest 100 is an ultramarathon race held in Washington state. Founded in 1999, it is 100 mi in length with over 23,000 ft of elevation gain. It is considered one of the most challenging mountain trail ultras in the United States, and is a qualifier for both the Western States Endurance Run and Hardrock Hundred Mile Endurance Run.

Starting and finishing in Easton, Washington, Cascade Crest is a loop within the Cascade Mountains. Rugged and steep, the course includes many difficult sections including a rope-assisted descent, a 2.3 mile railroad tunnel, and some notoriously overgrown sections of trail. Randy Gehrke founded the race in 1999, and the course most recently changed in 2016 to include additional elevation gain.