Fourmidable 50k Results 2025. Come and participate in one of the most challenging 50k in the auburn/cool area. During your registration runners will be able to donate a few dollars towards prize money.

While the name fourmidable comes from the four major climbs along the course in the 50k, the 35k shares 3 of those 4 major climbs. 50k, 35.5k, 1/2 marathon and 13k.