Sierra Buttes Trail Stewardship (SBTS), is a 501c3 founded in 2003 to enhance, restore and build trails in the Plumas and Sierra counties. Our organization is volunteer driven having donated over 50,000 hours to the forests we love. We believe that multi use trails provide recreation infrastructure that drives sustainable economic development. We provide outreach opportunities by hosting events year around in the Lost Sierra. Our events are world class and showcase the amazing and diverse beauty of the area. Our three races are: Downieville Classic: www.downievilleclassic.com Lost and Found Gravel Grinder: www.lostandfoundbikeride.com Grinduro!: www.grinduro.com We also operate a shuttle and bicycle demo business in Downieville, CA called Yuba Expeditions. www.YubaExpeditions.com Take the time to come and explore with us in the Lost Sierra.