FOURmidable 2027
- Date
- Saturday, February 13, 2027
- Start time
- 8:00 AM start (New York)
- Location
- Auburn, California
- Entry fee
- From $40
- Included with entry
- Includes a shirt
Registration is open.
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Official race websiteAdd to calendar: Apple or Outlook · Google
Events and entry fees
| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| FOURmidable 50k | 50K | Feb 13, 20278:00 AM | $80 | – |
| FOURmidable 35k | Other | Feb 13, 20278:15 AM | $60 | – |
| FOURmidable Half Marathon + | Half Marathon | Feb 13, 20278:30 AM | $50 | – |
| FOURmidable 13k | Other | Feb 13, 20278:45 AM | $40 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
Race day planning
Entry fee schedule
- FOURmidable 50k: $80 until Oct 31.
- FOURmidable 35k: $60 until Oct 31.
- FOURmidable Half Marathon +: $50 until Oct 31.
- FOURmidable 13k: $40 until Oct 31.
Online registration closes Oct 31, 2026, unless the race fills first.
How the price compares
At $80, entry is about 20 percent below a typical 50K in California, which costs $99.50 right now.
What a typical finish looks like
A typical finisher at a 50K in California runs 6:35:17, about 12:43 a mile, based on 21 races with published results. Women typically finish in 6:53:54 and men in 6:30:53.
Light and altitude
Sunrise on race morning is at about 9:59 AM, and the FOURmidable 50k starts at 8:00 AM. The start sits about 1,420 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Start location and course
855 Pacific ave, Auburn, CA 95603
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
2026 results
All results (2 years)FOURmidable 50k
FOURmidable Half Marathon +
FOURmidable 13k
Aggregated from official results for FOURmidable. Individual finisher names are not stored here.
How fast do you need to be at FOURmidable?
At the 2026 FOURmidable 50k, the fastest tenth finished in 5:08:36 or better, the top quarter in 5:41:42, and half the field in 6:35:17; the last tenth came in after 8:06:58.
At the 2026 FOURmidable Half Marathon +, the fastest tenth finished in 2:39:28 or better, the top quarter in 3:00:34, and half the field in 3:34:11; the last tenth came in after 4:53:17.
At the 2026 FOURmidable 13k, the fastest tenth finished in 1:31:40 or better, the top quarter in 1:48:42, and half the field in 2:21:10; the last tenth came in after 2:57:50.
| Age | Women | Men |
|---|---|---|
| 20-29 | 5:52:01 | 5:34:50 |
| 30-39 | 4:53:36 | 4:51:57 |
| 40-49 | 6:00:55 | 4:40:27 |
| 50-59 | 7:21:22 | 5:11:59 |
| 60-69 | n/a | 7:21:22 |
Groups with fewer than five finishers are left out. Awards vary by race; check the race's rules.
What would my time get me?
Where a finish time would have placed in 2026.
Finishers by year
Down 39 percent since 2022.
All events combined, from official results.
FOURmidable 50K year by year
From 2022 to 2026, the field went from 207 to 150 finishers, and the median time dropped from 6:49:29 to 6:35:17.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2026 | 150 (-28%) | 6:35:17 | under 5:08:36 | 3:50:55 |
| 2022 | 207 | 6:49:29 | under 5:23:17 | 3:46:49 |
From each year's official results for the 50K; virtual options are left out.
How fast is it?
Faster than most California trail 50Ks
The fastest quarter of the 2026 50K field finished under 5:41:42, against 5:57:15 in a typical California trail 50K, so times here run 4 percent faster.
- Half Marathon: Slower than most California trail half marathons. The fastest quarter of the 2026 half marathon field finished under 3:00:34, against 2:21:30 in a typical California trail half marathon, so times here run 28 percent slower.
Compares the fastest quarter of each field, so walkers and first-timers do not skew it. It reflects the course and the field together: a flat course, cool weather, or a competitive crowd all make times faster.
Typical race-day weather
Around February 13 the day usually runs from 37°F at dawn to 58°F in the afternoon, with measurable rain on about 27% of days. Cold snaps dip to 29°F and hot years reach 69°F.
Based on 75 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.
Race details
- Where
- 855 Pacific ave, Auburn, CA 95603Map
- Course
- Trail
- Start elevation
- About 1,420 feet
- Included with entry
- T-Shirt
- Distances
- Half Marathon, 50K, Other
- Editions
- 2027 (Feb 13, 2027), 2026 (Feb 21, 2026), 2022 (Feb 19, 2022), 2018 (Feb 17, 2018), 2017 (Feb 18, 2017)
Organize this race? Add details or a correction
Plan your race
Quick answers
- When is FOURmidable?
- Saturday, February 13, 2027, starting at 8:00 AM.
- How much does it cost?
- Entry starts at $40 before processing fees.
- When does registration close?
- Online registration closes Oct 31, 2026, unless the race fills first.
- Is the entry fee high for California?
- At $80, entry is about 20 percent below a typical 50K in California, which costs $99.50 right now.
- Do runners get a shirt or medal?
- Entry includes a shirt, according to the race's registration page. Check it for sizes and whether kids' races get the same.
- What distances can I run?
- Half Marathon, 50K, Other.
- How big is it, and how fast?
- In 2026, 150 runners finished the FOURmidable 50k; the median finish was 6:35:17 and the winner ran 3:50:55.
- Is it a fast course?
- The fastest quarter of the 2026 50K field finished under 5:41:42, against 5:57:15 in a typical California trail 50K, so times here run 4 percent faster.
- Where does it start?
- 855 Pacific ave, Auburn, CA 95603.
From the organizers
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