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Latest News

9 Apr

Lost and Found 2020 is Canceled

Yesterday we made the painful announcement that Lost and Found 2020 is now canceled to protect the safety of citizens and visitors to the Portola, CA area in...
27 Mar

Comments Needed for 2020 Downieville and Quincy Trailwork

Sierra Buttes Trail Stewardship (SBTS) has applied for four project grants this year and need your comments to CA-OHV on both so we can receive the grants and...
24 Mar

Mountains to Meadows Registration Coming Soon

More than a gravel event, the “Original Gravel Enduro” is a celebration of the outdoors – come for the ride and stay for the party Good rides and good...
14 Feb

25th Annual Downieville Classic Registration Opens February 17 at 8PM PST

Bar ends, V-brakes, three front chainrings and sub-par suspension with 80 millimeters of rubber elastomer travel; this was the mountain bike technology of the...


Miles of New Trail Built


Miles of Trail Maintained


Trail Volunteers Hours



Upcoming Events

Apr 18 / 8AM - 3PM Quincy, CA

Quincy Trail Daze – April 18, 2020

Due to Coronavirus concerns and following Plumas County Health recommendations, this event has been canceled. Project Overview Volunteer workday project...
May 15 - May 17 / 7am - 2pm Quincy, CA

Annual Mountain Epic – May 15-17, 2020

Due to Coronavirus concerns and following Plumas County Health recommendations, this event has been canceled. We will continue to monitor the situation...
Jun 6 / 6:30 AM - 3:00 PM Portola, CA - The Lost Sierra

Lost and Found Gravel Grinder: June 6, 2020

Lost & Found has been canceled, see our statement on the cancelation. 30 mile, 60 mile and 100 mile epicly beautiful bike ride. A perfect blend of...
Jun 20 / 8:30am - 5pm Downieville, CA

Downieville Trail Daze – June 20, 2020

Project Overview: Take Dad out for Father's Day Weekend to do volunteer trail work on Downieville trails with the SBTS Pro Crew! It's better than a neck...
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Become a volunteer

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Volunteer at a Trail Daze or one of our races. Contact us if you would like to volunteer other skills or services.

3 Ways to Get Involved

Join our tribe, do good work and have a load of fun, our members provide a crucial backbone to our organization.

Ride with Us

Since 1991, Yuba Expeditions has been shuttling riders on adventures in Downieville.

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Attend an Event

Attend our next Trail Daze, Mountain Epic, the Downieville Classic, Grinduro or Lost and Found.

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Join Our Tribe

Join today as a Core or Annual Member to support trails and access our exclusive membership perks.

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We promise not to spam you, we just want to pass on the building trails stoke and enjoying the Lost Sierra.