Latest News

28 Jul

Riding Downieville on eBikes

Last week the Stewardship and Yuba Expeditions hosted Fox Factory, Shimano and Pivot Cycles, bringing an entire fleet of Shuttle electric mountain bikes to...
23 Jul

Patagonia and Sierra Buttes Trail Stewardship Expand Partnership

Sierra Buttes Trail Stewardship (SBTS) today announced an expanded partnership with Patagonia, Inc., including environmental support grants, employee volunteer...
11 Jul

Epps and Yuba Expeditions raise $5,000 in One Day for SFMR

In the wake of Measure C failing to reach a 2/3rds majority in the Downieville Fire Protection District to help fund a full-time paramedic, there was a...
4 Jun

Win a Handmade Gravel Bike in the Builders for Builders Fundraiser

Bicycle frame building and trail building are as much forms of art as they are meant for adventure. The Sierra Buttes Trail Stewardship is honored to be the...


Miles of New Trail Built


Miles of Trail Maintained


Trail Volunteers Hours



Upcoming Events

Jun 1 / 6:30 AM - 3:00 PM Lake Davis, CA - The Lost Sierra

Lost and Found Gravel Grinder: June 1, 2019

30 mile, 60 mile and 100 mile epicly beautiful bike ride. A perfect blend of pavement, dirt road, gravel road and historic railroad grade. The route is 100...
Aug 1 - Aug 4 / early - late! Downieville, CA

Downieville Classic Mountain Bike Race – Aug 1-4, 2019

Come to prove yourself, or just come to have fun. All Mountain World Championships Cross Country Adventure Race Downieville Downhill Race...
Sep 28 / early -> late! Quincy, CA - The Lost Sierra

Grinduro – September 28, 2019

A New Kind of Bike Race Voted “Event of the Year” by the Design and Innovation Awards committee, the unique format of Grinduro combines the best elements...
Oct 13 / 8am - 5pm Graeagle, CA

Lakes Basin Trail Daze – October 13

Project Overview Volunteer workday project focus will be on the Lakes Basin trails. Volunteers will help the SBTS crew maintain Lakes Basin trails. The hike...

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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