Latest News

26 May

A New Trails Renaissance

If there's one thing learned from our newfound reality, it's that trails are an essential part of human existence. As long as organisms have roamed Earth under...
7 May

25th Annual Downieville Classic Canceled

With great sadness the Sierra Buttes Trail Stewardship announces the cancelation of the 25th Annual Downieville Classic. Although the decision to cancel was...
30 Apr

Santa Cruz Bicycles Manufactures and Donates PPE for Lost Sierra First Responders

(Downieville, CA) April 30, 2020 - The Sierra Buttes Trail Stewardship, in partnership with Yuba Expeditions bike shop and The Lure Resort in Downieville today...
16 Apr

SBTS Partner and Volunteers of the Year for 2019

WTB is the 2019 SBTS Partner of the Year! Wilderness Trail Bikes (WTB) has been a part of the Lost Sierra trail scene since the early 90’s when their staff...


Miles of New Trail Built


Miles of Trail Maintained


Trail Volunteers Hours



Upcoming Events

Jun 20 / 8:30am - 5pm Downieville, CA

Downieville Trail Daze – June 20, 2020

Due to Coronavirus concerns and following Plumas County Health recommendations, this event has been canceled. 🙁 Project Overview: Take Dad out for...
Jul 30 - Aug 2 / early - late! Downieville, CA

Downieville Classic Mountain Bike Race – July 30th – Aug 2nd, 2020

The Downieville Classic has been canceled, see our statement on the cancelation. All Mountain World Championships Cross Country Adventure Race...
Sep 21 - Sep 27 / early -> late! Quincy, CA - The Lost Sierra

Mountains to Meadows

Due to Coronavirus concerns and following Plumas County Health recommendations, this event has been canceled. We hope to reschedule for September 2021. A New...

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 the family, 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 The Family

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.