Registration Information

Registration for the 2018 Lost and Found is open!

Eventbrite - Lost & Found Bike Ride 2018

The last couple of years, the race has sold out, so make sure to get on it!



Where Your Money Goes

Events are one of several ways the SBTS raises funds for making trail magic happen in the Lost Sierra. If you've ever ridden the iconic trails of Downieville, the Lakes Basin and Mills Peak near Graeagle, or our newest creation, Mount Hough Trail in Quincy, you know how much time and effort goes into making these world-class trails.

Our three events - the Lost and Found Gravel Grinder, the Downieville Classic and Grinduro - are not only filled with challenges, adventure, camaraderie and a huge post-event celebration, but part of your entry fee also helps employ local Plumas and Sierra County residents full-time, working to establish a more sustainable recreation-based economy.

Participating in an SBTS event is more than just riding your bike and having a good time; it's helping create some of the best trails in America while helping communities in the Lost Sierra thrive, keeping the dream of wholesome mountain living alive and well. Thanks for your continued support and participation, and see you trailside!

Racer Categories

65 and 100 mile routes:

Pro Men (100 mile route only)*
Pro Women (100 mile route only)*
Singlespeed Open*
Junior Men 13-18*
Men 30 & Under*
Men 31-40*
Men 41-50*
Men 51-60*
Men 61+*
Junior Women 13-18*
Women 30 & Under*
Women 31-40*
Women 41-50*
Women 51+*

*Eligible for Triple Crown points

45 mile:

Men open ages
Women open ages



On Site Registration and Check In
  • Friday TBD
  • Saturday TBD AM

The Lost Sierra Triple Crown – A Premier Knobby Tire Challenge

For riders seeking the ultimate challenge of both fitness and bike handling skills, the Sierra Buttes Trail Stewardship introduces a new three-event series for 2017 called the Lost Sierra Triple Crown. Consisting of the Lost & Found 100-mile Gravel Grinder on June 2, the Downieville Classic Cross-Country on August 4 and the Grinduro on September 29th, the Lost Sierra Triple Crown will promise to be a fun and challenging endeavor for all participants.

The Lost Sierra Triple Crown will be based on the same points system used in the Downieville Classic All-Mountain World Championships, and will be applied to placing based on the three aforementioned events across 14 categories. To be eligible, riders must register for the Lost & Found 100-mile event, the Downieville Classic Cross-Country (All-Mountain participants are also eligible) and the Grinduro – a unique event combining a gravel grinder with an enduro. Triple Crown winners will be announced at Grinduro on September 29th.

Riders can use any bike they wish for the three different events; the same bike is not required. For those not familiar with the three events, a cyclocross bike with disc brakes and tubeless tires has been very successful at the Lost & Found and Grinduro, while a capable hardtail or lightweight full-suspension bike with durable tires works best for Downieville.

Riders participating in the Lost Sierra Triple Crown must indicate during registration of each event they wish to take part by clicking a box during the registration process. Racing age will be determined based on age as of December 31, 2018. 

Registration for the Downieville Classic opens March 25th while registration for Grinduro! opens on April 22. Both events are expected to sell out quickly, so participants are encouraged to mark their calendars and register on the opening dates. There is no registration offered for all three Triple Crown events at one time, participants must register individually for each event.

More Triple Crown Info

Race Start

  • All categories will stage at least 15 minutes prior to start time for instructions on completing the ride.
    Ride start will be as follows:
    • 8:30 - 100 mile Pro Men, Pro Women and Single Speed Classes
    • 8:35 - 100 mile amateur riders
    • 9:30 – 65 mile riders
    • 9:35 – 45 mile riders
  • Pro Men and Women will each be racing for a cash purse.
  • All other categories will be racing for podium awards from our great sponsors.
  • Many will choose to ride, rather than race and take advantage of the views, the libations and the serenity.

Ride will be held rain, shine, sleet or snow. In the event of extreme weather or natural disaster, the ride may be shortened, postponed or canceled without refund.

Sierra Buttes Trail StewardshipEvent Beneficiary

Net proceeds from this event will benefit the Sierra Buttes Trail Stewardship trail maintenance program.