Registration for FOURmidable runs $40 to $80 depending on distance. Held in Auburn, California on February 20, 2027, this trail running event offers four options: a 5K, 13K, 13.4-mile race, and a 50K ultra. The race starts at 8:00 AM from 855 Pacific Avenue. Whether you're looking for a short trail outing or tackling the longer ultra distance, FOURmidable provides multiple ways to test yourself on trail terrain in the Sierra Nevada foothills region.
From the Race Organizer
FOURmidable Trail Run (50K | 35K | Half Marathon+ | 13K) Presented by SingleTrack Running Location: Auburn Overlook Park — 855 Pacific Ave, Auburn, CA 95603 Are you ready to test your grit on one of Northern California's premier trail challenges? Hosted in the endurance capital of the world, the FOURmidable Trail Run takes runners through the rugged, scenic canyon trails of the Auburn and Cool areas. Featuring less than one mile of pavement across all distances, this event treats you to singletrack trails, river canyon views, and the infamous climbs that give the race its name. The Four Climbs The signature 50K course packs over 6,000 feet of cumulative elevation gain, headlined by the "FOUR" formidable climbs: Cardiac Hill K2 (aka Training Hill) Knickerbocker (Old Auburn Dam Site) Overlook Hill Whether you take on the full 50K ultra or choose the 35K, Half Marathon+ (13.2 mi), or 13K, you will experience the best singletrack Auburn has to offer. Race Schedule & Start Times All distances run on race day. Distance Start Time 50K 8:00 AM 35K 8:15 AM Half Marathon+ (13.2 mi) 8:30 AM 13K 9:00 AM What's Included Custom Swag & Bibs: SingleTrack Running takes pride in quality, practical swag designed to celebrate your finish without cluttering your closet. Fully Stocked Aid Stations: Staffed by experienced trail volunteers ready to help refuel and hydrate you quickly. Stations include water, electrolyte drink, gels, soda, boiled potatoes, candy, salt tabs, and more. Post-Race Celebration: Finish at Overlook Park with plenty of hot food, drinks, and trail camaraderie. Important Event Logistics 1. Cupless Racing In an effort to keep trails clean and minimize waste, FOURmidable is a 100% cupless event. Every runner must carry a handheld bottle, hydration pack, or reusable collapsible cup. Paper cups will not be provided at aid stations. Collapsible cups will be available for purchase on-site, or you can bring your own. 2. Packet Pick-Up Early Pick-Up (Recommended): Friday (day before the race) from 3:00 PM – 6:00 PM at the Start/Finish area (Auburn Overlook Park). Race Morning: Available at Overlook Park starting 1 hour prior to your wave start. Note: Any swag/bibs not claimed by race start will be gifted to race-day volunteers. 3. Parking & Vehicle Camping Runner Parking: Primary parking at Overlook Park is reserved for registered runners. Overflow parking is available along Pacific Ave and at the nearby staging area (staging area parking requires a paid fee—please obey posted local signs).
Course & Travel Notes
In February, Auburn averages a high of 59°F and a low of 40°F with precipitation on 37% of days. The FOURmidable venue sits at 1299 feet elevation. Sunrise occurs at 6:58 AM, approximately 1 hour 2 minutes before the 8:00 AM start time. Sacramento International Airport is 30.8 miles from the venue.
⛰️ 1,299 ft elevation☀️ Typically 59°F / 40°F · 37% chance of rain✈️ Sacramento International Airport (SMF) — 30.8 mi
Hotels Near This Race
Find accommodation close to the start line in Auburn, CA. Sorted by distance from the race venue. Book early — race weekend hotels fill fast.
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Race Travel Insurance
Don't forget travel insurance for February 13.
You've trained for months and booked a trip to Auburn, CA.
A pre-race injury, a delayed flight, or a family emergency can derail the whole thing.
Travel insurance can help cover your race entry fee, hotel, and flights if you can't make it,
and may cover medical costs if something goes wrong on the course. Plans typically only run
5-7% of your total trip cost — and running events are covered under standard plans with no
additional coverage needed.
Trip cancellation up to 100% of prepaid costs
Running events covered under standard plans — no add-ons needed
Trip interruption up to 150% of non-refundable costs
FOURmidable 2027 — Auburn, CA takes place on February 13, 2027. The race is held in Auburn, California.
Where is FOURmidable 2027 — Auburn, CA held?
FOURmidable 2027 — Auburn, CA is held at 855 Pacific ave in Auburn, California.
Where can I find hotels near FOURmidable 2027 — Auburn, CA?
RaceHotelFinder shows hotels sorted by distance from the race venue in Auburn. Use the map or list view on this page to compare options and book race weekend accommodation.
