Showing 7 events within 50 km in the next 365 days.
About Welcome to the 2026 Lost Sierra Endurance Race, one of California’s most scenic and demanding trail races, set in the rugged high country of the northern Sierra Nevada. Join us Saturday, July 25, 2026, in Downieville, CA for your choice of 25K, 50K, or 100K, each offering a unique journey through river canyons, alpine ridgelines, and remote singletrack. Stick around after your finish for a celebratory post-race party at the finish line.The flagship 100K is no ordinary ultra, it’s one of the hardest 100Ks in California. This out-and-back route follows the legendary Third Divide, Pacific Crest Trail, and Lakes Basin Trails, climbing thousands of feet from historic Downieville to Johnsville / Blairsden and back. Expect a raw, remote, and wildly scenic adventure that will push you to your limit.The 50K begins at Plumas-Eureka State Park and follows the same stunning terrain back to Downieville, delivering a tough and technical point-to-point experience with mountain lakes, granite ridges,
and dense forest trails.The 25K starts and finishes in Downieville, offering a more approachable course through the lower river canyons, ideal for runners looking to sample the region’s beauty without the full ultra challenge.Join us July 25, 2026 for the third annual Lost Sierra Endurance Race, where every mile is earned and every view is unforgettable.Presented by: Bad Luck Run Club Sneak Peek 100K Our 100K distance is an out-n-back course starting in downtown Downieville, traveling up towards the Sierra Buttes then turning north to Plumas-Eureka State Park (PESP), Blairsden, CA where the turnaround is. There are 5 unique aid stations (a total of 9 stops along the course) with three crew access points: Aid #2, Aid #4, and Aid #5.All 100KM participants are required to carry a headlamp, space blanket, and water bottle during the race due to remoteness of the course. Pacers are allowed starting at Aid #5 / Mile 30 or at Aid #2 / Mile 47, there is no shuttle for pacers. Cutoff Time: 20 Hours
(1:00AM Sunday)Start Location: Downieville, CAAid Stations:Mile 5.3 - Lavezzola Road (Aid #1)Mile 15.2 - Golden Valley Summit (Aid #2)Mile 20.1 - Lots O Lakes (Aid #3)Mile 25.6 - Smith Lake Trailhead (Aid #4)Mile 29.8 - Plumas-Eureka State Park (Aid #5)Mile 34.1 - Smith Lake Trailhead (Aid #4)Mile 39.5 - Lots O Lakes (Aid #3)Mile 47 - Golden Valley Summit (Aid #2)Mile 54.2 - Lavezzola Road (Aid #1)Route: 50K & Shuttle Our 50K distance is an point to point course starting in Plumas-Eureka State Park (PESP) in Blairsden, just outside Graeagle, traveling up towards the Sierra Buttes then turning south to Downieville where the finish is. There are 4 unique aid stations with crew access at Lavazzo Rd (mile 23).Runners will be shuttled from Downieville to PESP to start the race. Shuttle cost is $12 or you may have someone drop you off at the start. Shuttles leave at 6:00AM from Downieville. There are no shuttles from Downieville to PESP after the race. Start Location: Plumas-Eureka State Park,
Blairsden, CAAid Stations:Mile 5.3 - Smith Lake Trailhead (Aid #4)Mile 11.5 - Lots O Lakes (Aid #3)Mile 16.5 - Golden Valley Summit (Aid #2)Mile 24.8 - Lavezzola Road (Aid #1)Route: 25K Our 25K distance is an looped course starting in downtown Downieville, traveling up through the canyons on the First, Second, and Third Divide Trails. There is a brief water stop at mile 4.2 and one formal aid station at Lavazzo Rd (mile 10).Start Location: Downieville, CAAid Stations:Mile 4.2 - Water StationMile 10.9 - Lavezzola Road (Aid #1)Mile 12.0 - Water StationRoute: Cut Offs & Other Items Cut-Off Times:50K: 11:00:00 Total Time or 7:00PM at Average 21:30 Pace100K: 20:00:00 Total Time or 1:00AM at Average 19:55 PaceMile 29.8 - 3:00PM (19:55 pace) - Plumas-Eureka State Park (Aid #5)Mile 34.1 - 4:40PM (19:55 pace) - Smith Lake Trailhead (Aid #4)Mile 39.5 - 6:30PM (19:30 pace) - Lots O Lakes (Aid #3)Mile 47 - 8:00PM (19:30 pace) - Golden Valley Summit (Aid #2)Mile 54.2 - 11:15PM (19:55 pace) - Lavezzola
Road (Aid #1)Mandatory Items:100KM runners must carry a vest / pack, space blanket, and headlamp for the duration of the race.Sticks & Pacers:All runners may carry and use running poles / sticks. 100K runners may have pacers on the return trip at Aid #5 (Mile 30) or Aid #2 (Mile 47), there will be no event shuttle to/from these locations for pacers. The Unity Initiative In response to recent federal aid cuts, The Unity Initiative was created to support vital nonprofits that serve our communities. By donating to one of our partner organizations, participants can receive a future race discount and have their donation matched — up to $40 or 25% of their registration fee. This program aims to restore a sense of unity and compassion, ensuring local organizations continue to thrive despite reduced government support. Together, we can keep our communities strong.Selected Nonprofit Partners:- Placer Food Bank- Sacramento Food Bank- Court Appointed Special Advocates for Children of Sacramento
(CASA)- Court Appointed Special Advocates for Children of Placer County (CASA)- AcademySTAY- Sierra Club of California- Placer Land Trust- American Civil Liberties Union*Future discounts will be sent upon receipt of proof of donation. Please email donation receipts to [email protected]. Donations must be made in 2025-2026 and prior to event date(s). Event's current local time: 1:07 AM PT
About
This is essentially the original Yuba Gold 50K point-to-point course from South Yuba Campground to Bear Valley.Despite the "Virtual" banner, this is not a virtual event. We are using this format so that runners can self-report results.These are Hybrid events (aka DIY or Self-Guided). Essentially, what this means is you'll go out and complete the course on your own, with friends if you like, and/or with aid provided by friends.Afterward, submit your results here with your activity link for proof of completion, and you'll receive a finisher award and rank in the results. Note that you must submit your results within one week of the close of this event.You will have the entire month of October complete it. In other words, you choose when to run the course - it just has to be run continuously (all in one go) and within the specified time period.GPX fileFeel free to coordinate with others in the Facebook group or Strava club.More Hybrid Events from Skybreaker Racing
Map
Event's current local time: 1:38 AM PT
About
Yubaneer gets it's name from the Yuba River and Pioneer Trail.This is a Hybrid event (aka DIY or Self-Guided). Essentially, what this means is you'll go out and complete the course on your own, with friends if you like, and/or with aid provided by friends.Afterward, submit your results here with your activity link for proof of completion, and you'll receive a finisher award and rank in the results. Note that you must submit your results within one week of the close of this event.You will have the entire month of April to complete it. In other words, you choose when to run the course - it just has to be run continuously (all in one go) and within the specified time period.Being that this route is a single loop, you can start and finish anywhere along the route that you'd like.GPX fileFeel free to coordinate with others in the Facebook group or Strava club.More Hybrid Events from Skybreaker Racing
Map
Event's current local time: 1:58 AM PT
Challenge Yourself and Enjoy the Great Outdoors
Join the Sierra TrailBlazers Running Club and Bear Yuba Land Trust for the inaugural Champion Mine Trail Race!
Get ready to travel to a must-see destination race in Northern California. Explore some of Nevada City’s most exciting trails with this brand-new half-marathon (13.1 miles) event. The course winds through towering pines, crosses a historic swinging bridge, and challenges runners with a series of rewarding climbs. With multiple aid stations, historical landmarks, and a newly constructed trail section offering varied terrain, this course rivals some of the best trail races in Northern California.
Runners will enjoy breathtaking views along the Tribute Trail and Deer Creek, combined with a beautiful variety of landscapes throughout the race. Best of all, the adventure begins right on Nevada City’s historic Broad Street — a truly unforgettable starting line!
The Champion Mine Trail Run offers a dynamic mix of pavement, gravel, and single-track trails, making it a must-do event for any trail enthusiast.
ONLINE registration for race closes on Thursday, September 9th at 5pm PST. You may still register on-site at packet pickup.
Registration for camping passes will remain open through Saturday at 10PM. Passes will automatically be sent to your email.
Overview
Email the RD at [email protected] to get on the waiting list, everybody who has ever been on the waiting list has gotten in25 and 50 mile fatass style run along the wild and Scenic North Fork of the American River. Expect roughly 10,000' of climbing for the 25 mile and 20,000' for the 50, with a good amount of bushwhacking and route finding thrown in for good measure. Free to enter, but the rule is that you have to wait at the finish for at least one runner to come in.The forest service has confirmed that we don't need a permit as long as we keep it small, so registration for both distances combined will be limited to 50 people. Since portions are off trail, I'm not going to post the map until the week before the event, but it will start and finish at the Shirttail Creek Campground near Foresthill, CA and go up and down out of the canyon using Euchre Bar, Pioneer Mine, Ebeneezer's highway, Green Valley, Mumford Bar, and Italian Bar. There will be one location for drop bags and crew to meet you that you will pass through twice.Don't kid yourself, this is a hard, hard run. Last year's finishers took 14 hours for the 25, and 25 hours for the 50. Distances are approximate, and may refer to nautical miles.Ultrasignup is gracious enough to host fatass events for no cost, but unfortunately the waitlist does not set up for free events. If the event is full, email the RD to get on the waitlist. Everybody who has ever been on the waitlist has gotten in. We have a group campsite for Friday and Saturday night.
Event's current local time: 1:44 AM PT