Jefferson Mountain Bike Challenge: YMCA Mountain Bike Racing Series

Join us for our 16th season of  offering the fun, competitive and challenging Siskiyou Family YMCA Mountain Bike Race Series.  The beautiful Upper Greenhorn Park in Yreka, CA is the perfect place to spend your Tuesday evenings. This three part series includes A, B and C category races with distances from 3 to 12 miles. Enjoy food, drink and raffle prizes after each race.