Showing 145 events within 150 km in the next 365 days. Page 1 of 8.
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
About Rubicon noun A limit that when passed or exceeded permits of no return.The Rubicon is a very difficult and remote on and off-trail foot race in the backcountry of the northwestern Sierra Nevada, and its undertaking should not be taken lightly. Make no mistake - this endeavor will test your limits!Disclaimer: This is not an official event. This is a fatass; a glorified group run. There will be no course markings, no aid stations, no staff, and no medical team.The route options are as follows:The Requisite: 15+ miles, ≈6,700 ft of gain, 3 hill climbs, & 2 water crossingsThe Resonant: 30+ miles, ≈12,700 ft of gain, 6 hill climbs, & 6 water crossingsThe Revenant: 43+ miles, ≈19,300 ft of gain, 8 hill climbs, & 8 water crossingsYou must first complete The Requisite in order to be eligible for an attempt of The Resonant in the future.You must first complete The Resonant in order to be eligible for an attempt of The Revenant in the future.More info can be found here.For updates, please join
the Facebook group.Scheduling: The Rubicon will fall on the 4th Saturday of October when there are 5 Saturdays in the month. When there are 4, it will move to the 1st Saturday to avoid conflict with Hilloween. Event's current local time: 1:55 AM PT
Please Review the attached PDF for more Event information.
Competition Waiver:
Follow the LINK HERE to sign the Competition Waiver before Check-in. We require that this be signed before Athletes are able to compete.
Please have this done prior to check in and your confirmation pulled up to expedite the line.
There will be two lines at check in- those who have raced this season and those who still need to fill out waivers / have any issues signing the waiver. Please stand in the line that pertains to you!
Please note that this waiver is different from the one you sign to purchase a lift ticket.
Please review attached PDF for Event Information
Competition Waiver:
Follow the LINK HERE to sign the Competition Waiver before Check-in. We require that this be signed before Athletes are able to compete.
Please have this done prior to check in and your confirmation pulled up to expedite the line.
There will be two lines at check in- those who have raced this season and those who still need to fill out waivers / have any issues signing the waiver. Please stand in the line that pertains to you!
Please note that this waiver is different from the one you sign to purchase a lift ticket.
Please review attached PDF for the Event Information
Competition Waiver:
Follow the LINK HERE to sign the Competition Waiver before Check-in. We require that this be signed before Athletes are able to compete.
Please have this done prior to check in and your confirmation pulled up to expedite the line.
There will be two lines at check in- those who have raced this season and those who still need to fill out waivers / have any issues signing the waiver. Please stand in the line that pertains to you!
Please note that this waiver is different from the one you sign to purchase a lift ticket.
Join the Ultimate Loop Adventure in the Heart of Trail Country!
Mile Madness is more than a race—it's a vibrant celebration of endurance, community, and personal triumph. Set against the stunning backdrop of Auburn, California, this looped trail event invites runners of all paces to push their limits (or simply enjoy the journey) on a meticulously designed 1-mile course, mainly paved bike path, blending a beautiful pond, shaded paths, and much more for an unforgettable experience.
Event Details:
Dates: September 18-21, 2026
Friday:
9:00 am 72 Hour Run and 72 Hour Team Relay
6:00 pm: 48 Hour Run and 48 Hour Team Relay
Saturday:
9:00 am 100 Mile Race
Noon: 12 Hour and 24 Hour
6:00 pm: 6 Hour Glow Run
Location: Regional Park, 3770 Richardson Dr, Auburn, CA 95602
Race Options: Choose your challenge from 8 timed events, ranging from a beginner-friendly 6-hour run to the epic 72-hour ultra. With exceptionally long cutoffs and no strict time pressures, whether you're walking, running, or crawling, there's space for everyone to shine and even earn one of the coveted Mile Madness Buckles.
Course Highlights: A compact 0.85 mile loop means continuous laps with easy access to aid stations, festive decorations, and upbeat music to keep your spirits high. Aim for that first ultra milestone or chase elite goals—many of our runners discover untapped potential here. The course will be professionally measured prior to the race.
Why Mile Madness?
Inclusivity for All: We had runners from ages 10 to 82, with a balanced mix of 52.8% male and 47.2% female participants. In 2024, we welcomed 115 runners with a remarkable 72% buckle completion rate (applies to 48- and 72-hour runners); 2025 was 140 strong, and we're projecting 200-250 for 2026. Beginners who've never run an ultramarathon often surprise themselves with distances they never imagined.
Top-Notch Support: Fully stocked aid station featuring a rotating menu of hearty meals, electrolytes, all the typical aid station food, and endless encouragement from what might be the best volunteers in trail running. Other amenities include on-site massage therapists, family cheer zones, glow run, food trucks, and more...
Bling & Bragging Rights: Earn the coveted Silver 100-Mile Buckle (35 awarded in 2024, many to first timers!) or challenge yourself for the stunning Gold 150-Mile Buckle or the brand new 200-Mile buckle. Plus, a 100% rollover policy up to 24 hours before race start means zero risk if life throws a curveball.
SWAG: Every registered runner will get a race shirt or jacket. Our current plan is to provide gender-specific, packable, puffy jackets. We cannot guarantee sizes for registrations after 9/1/26, but we will do our best to accommodate requests. All runners will also get additional SWAG that will be announced closer to race weekend.
Bib Raffle: We will hold a bib raffle at regular intervals during the race. Registered runners will be entered into the raffle. It's a bonus: you might walk away with fantastic prizes, including shoes, handheld bottles, an antichafe stick, and more. Why should podium winners get all the bling?
Family & Community Focus: Bring your crew! Our expansive 20x30 Cheer Zone offers shaded comfort, music, free snacks and water, games, festive decorations, S’mores, and a DIY sign-making station to fuel the fun. Come solo or with friends—you'll leave with new bonds, shared stories, and memories that last a lifetime. Runners rave: "The highlight of my year!" (Summer W.) and "My favorite race ever!" (Shawnee).
Worry-Free Guarantee: We will roll over your race entry to the next year if you can't run due to injury or training challenges. We want you to enjoy the race you pay for, and we understand that life happens.
Extra Perks: Plenty of clean restrooms, and a commitment to giving back through the Run Free Foundation, whose mission is to empower at-risk youth and runners facing financial barriers by providing access to quality running gear and race registration scholarships, enabling them to pursue their athletic dreams and enhance their well-being.
Mile Madness isn't just about the miles—it's about the madness of joy, grit, and connection that turns strangers into trail family. Whether you're chasing a PR, your first buckle, or just the thrill of the loop, we're here to support you through every step. We may have the best volunteers in the business.
Relay Option: We have a 72-Hour Relay and 48-Hour Relay
Each relay team can have 4-10 runners. Each runner will register and pay a separate registration fee (which covers food, SWAG, and more) and select their relay team. Each team will share a single team bib with one runner at a time on the course. Other team members can use a Pacer bib to support their team member running with the team bib.
Podium awards will go to the top three teams.
Relay runners are not eligible to earn a 100-mile buckle (relay laps should be shared somewhat evenly between team members, so achieving 100 miles per runner is unlikely).
Ultra Lounge: The family cheer zone is getting a more fitting name. We are borrowing the Ultra Lounge name and will have our 13x26 wedding tent with fun activities that will keep your crew going so they can keep cheering you on. We will have food and water, a poster-making station, a glow party, cornhole, and more...
Referral Rewards: We want to reward you for referring other runners to Mile Madness. When you register, you will get a referral code to share. Have your family, friends, or social circle use that code, and you will receive a refund for every referral.
Earn $10 for any 6-Hour or 12-Hour referral. Earn $20 for each referral to the 24-Hour or longer races. The refund will happen automatically, and the referral code must be used by the person registering.
Questions? Email Race Director Brian Goldman at [email protected]. Let's make 2026 your most memorable madness yet!
"Standard distance. Mammoth vert."
Mammoth Bar Trail Runs take place on the single-track and double-track trails of Mammoth Bar OHV Area in Auburn State Recreation Area, in the Endurance Capital of Auburn, California.
Mammoth Bar is known for its steep climbs and descents, as well as it's beautiful American River Canyon views.
These are not your average courses. You get more vert per dollar! Yay!
Welcome, Brave Adventurers Return to the realm. On March 13, 2027, Bad Luck Run Club brings back Auburn's most legendary fantasy trail run, The Quest! Adventure Run. This year's event will be bigger, bolder, and with even more chaos waiting in the woods. Choose your path: a 6 mile sprint through the realm or a 12 mile odyssey. Expect a mini Renaissance Faire, with vendors, music, & food. The Journey both begins and ends at Ponderosa Cider Co. in Auburn, CA, your tavern of choice before and after battle. How The Quest! Works Choose Your Class - Before the quest begins, roll your fate. Every registered adventurer rolls a virtual D20 to determine their character class: Frog Knight, Mage, Rogue, Bard, Druid, or Knight. Your class determines your unique ability and party bonus on race day. Roll here: The Quest! Class FinderForm a Party - No adventurer conquers the realm alone. Assemble a party of 2–3 runners before the start line to unlock class-based party bonuses that shave time off your final
result. Don't have a crew? Show up to check-in and we'll help you find your people. Register your party here: The Quest! Party RegistrationSide Quests - Your journey won't be complete without them. Scattered along the route are designed side quests requiring everything from riddle solving and scavenger hunts to physical challenges and tracking down missing Goblins. Each completed side quest earns a time reduction bonus, the more you finish, the better your shot at glory.Hunt the Bosses - Keep your eyes open. Legendary creatures roam the course. Find them, face them, and earn your reward.Quest Gear - Every runner receives a custom D20, an official The Quest! shirt, a trail map loaded with quest details, and a post-run cider from Ponderosa Cider Co. Costumes are strongly encouraged, your outfit doesn't need to match your class, it just needs to honor the realm.Your Fate Awaits - No two adventures are the same. Complete side quests, stack your bonuses, and watch your adjusted finish time tell
the real story of your quest. The runner who combines speed, cunning, and quest mastery will be crowned Champion of the Realm. Event's current local time: 2:23 AM PT
LIVE Tracking and Real Time Race Results by UltraLive.net
For the 50K: https://www.ultralive.net/dd50k#tracking/infoFor the Half Marathon: https://www.ultralive.net/dd13#tracking/info
Do you have what it takes to survive Doomsday?
Close out 2026 with a bang and race your 50K or Half Marathon on a beautifully scenic race course.Generous 9.5-hour cutoff for the 50K and 5-hour cutoff for the Half Marathon, so hikers are welcome and trekking poles are allowed.High-quality finisher's medals and race shirts.Thrilling surprises along the race course.Limit 200 runners total.
Start Times
50K 7:30amHalf Marathon 7:30amBoth distances start together at the Cool Staging Area (7200 Saint Florian Court, Cool, CA 95614).
Parking
Parking fees are NOT included in your registration. Please display your Golden Poppy Pass or purchase a day use pass $10 (exact cash) as you enter the parking lot.Volunteers will direct you to park in the Day Use Lot or overflow parking on Haul Road. Arrive early for the best parking spots.
Cut-off times
50K 9.5 hours at the finish line with a mandatory intermediate cutoff time at Robie Point Aid Station at 2:15pmHalf Marathon 5 hoursEach course is hiker, back-of-the-pack friendly.
Packet Pick-up
Early Packet Pick-up is on Friday, December 11th 3-7pm at Auburn CrossFit 858 High Street, Auburn, CA 95603.Race Morning Packet Pick-up is Saturday, December 12th 5:45am to 7:30am at the Race Start (Cool Staging Area).
Elevation and Course Maps
50K is 5,100 feet gain/loss.Strava link: https://www.strava.com/activities/12968296356View online: https://footpathapp.com/routes/doomsday-50k/1F003BBB-B507-471A-A310-E7505F243587?s=460886Half Marathon is 1,250 feet gain/loss.Strava link: https://www.strava.com/activities/9996908151View online: https://footpathapp.com/routes/doomsday-half-marathon/87182167-EA1F-44C5-A3DD-6F1DFDC2FFA7?s=460835Doomsday 50K Alltrails LinkDoomsday Half Marathon Alltrails Link
ultraPacer
Our new sponsor, ultraPacer has brought you detailed maps and GPX files to help you strategize your race performance.https://ultrapacer.com/r/doomsday/50khttps://ultrapacer.com/r/doomsday/half
Aid Stations
50KMile 8.88 Knickerbocker TerrorMile 13.9 The Dissent of the DescendingMile 21.2 No Hands HorrorMile 23.1 Robie Point ResurrectionMile 27.8 No Hands HorrorHalf Marathon (only one aid station)Mile 8.88 Knickerbocker Terror
Swag and Awards
Every participant receives a race event shirt with killer race graphic.Every finisher earns a high-quality, weighted finisher's medallion.Top-three women and top-three men of each distance will receive custom three-dimensional trophies with race logo.
Event's current local time: 1:37 AM PT