Welcome to the 13th Annual Mt. Disappointment 25K and 50K Endurance Runs on Saturday, July 08, 2017. Both the Mt. Disappointment 25K and 50K will serve as the 2017 USATF Southern California Association Mountain / Trail Championships. Both distances are majestic, challenging, and all within the San Gabriel Mountains National Monument. The 50K has 5700 feet and the 25K has 3300 feet of elevation gain. We have race-shirts, aid-stations, finisher’s medals and awards. Have an Angeles National Forest adventure…and run the Mt. Disappointment Endurance Race.