One of the best ways of enjoying the Sierra Buttes Trail Stewardship experience is to support our events.

More than just races, our events are weekend long festivals that pull attendees from all over the world and are frequently featured in cycling’s premier publications. Race entry fees and event partnerships are another way we raise funds for our non-profit to maintain and build trails. Our events cater to everyone from professional athletes to the spectator looking to spend a fun weekend in the Lost Sierra. Together, we refer to our events as the Lost Sierra Triple Crown which challenge athletes to the ultimate test of fitness and skill.

Event Partners

Businesses who participate in our event corporate partnerships help to create amazing trails, employ Plumas and Sierra County residents, provide learning environments for local schools, and work to establishing a more sustainable recreation-based economy. The events listed below have various partnership levels, each of which comes with it’s own set of perks and exposure. While we have an established framework for each event partnership, we are always happy to work with you and your company to create a package tailored to your level of involvement. Email to get set-up as an event partner.

Event Volunteers

Support our events as a volunteer! Be a part of making our festivals successful while earning yourself an event t-shirt, free food and cold beverages! Experience our events from a whole new prospective and work the day with other fun loving folk. If you are interested in being an volunteer, contact Debbie our Volunteer Coordinator at

What racing needs, more than anything, is rowdy celebration.
– Mike Ferrentino, Grimy Handshake, Bike Magazine, March 2006

Everyone gets involved and spreads the love

Lost and Found Gravel Grinder

One of the only races of it’s kind, the Lost and Found Gravel Grinder encourages racers to ‘run what they brung’ on a challenging but beautiful course around Lake Davis near Portola, CA. Road frames with knobby tires, full downhill rigs, fat tired bikes, and everything in between can be found at this event. In 2017, the Lost & Found will be in it’s third year, and we expect ridership to increase dramatically – again.

I believe this event has the potential to become the next big thing.
— Emily Kachorek, Squid Bikes

Downieville Classic Mountain Bike Festival

The Downieville Classic has been rolling for over 20 years and is considered one of the Top Mountain Bike Festivals by Outside Magazine and Red Bull. It’s one of the world’s premiere mountain bike races, bookended by an awesome festival in one of California’s most beautiful locations. The All Mountain category (racing cross country and downhill combined) frequently sells out in less than two hours of registration opening and in 2016 all cross country racer slots also completely sold out.

Downieville shuts down the main street through town and the strip turns into a mountain bike Mardi Gras.
– Decline Magazine, November 2005


The growing Grinduro fame is taking flight after its first two years – named Event of the Year by the Design & Innovation Awards team for 2016, and ‘your new favorite bike race’ by Outside Magazine. Then when we hear, “The Grinduro format might just save bike racing…”, we tend to agree that this event is something spectacular. Grinduro sells out almost instantaneously, and by all accounts is the highlight of many racers’ year.

It was maybe the hardest 60 miles of my life, but it was also really damn fun.
– Grinduro: A Whole New Kind of Bike Race, Outside Magazine, November 2015