Adventurous mixed terrain, mountain bike and all pavé rides and races in Northern California. Just north of Marin County, the birth of mountain biking lies the cradle of adventure riding and racing. The Hoppers are the original mixed-terrain adventure races/rides in North America. These "not gravel grinders" are some of the most eclectic, scenic, challenging and thrilling courses in the world. Join us in adventure, exploration and shred.