FOURmidable
FOURmidable offers a challenging trail race with significant climbing, a cupless experience, and multiple distance options.
Race Date
Feb 20, 2027
Location
Auburn, CA
Quick facts
- Date
- Saturday, February 20, 2027
- Location
- Auburn, California
- Distance
- Half marathon (13.1 mi) + 50K, 35K, 13K
- Course
- Loop Course
- Terrain
- Trail
- USATF certified
- Not listed
- Finishers on record
- 299
Highlights
Good For
Atmosphere
Course
The Experience
The FOURmidable trail race in Auburn, California, presents a demanding test for runners, especially with its 50K event boasting over 6,000 feet of cumulative climbing. Runners can choose from a variety of distances, including the half marathon, 35K, 13K, and the signature 50K, all taking place on February 20, 2027.
The course is predominantly trail, with less than a mile of road across all distances. Participants will encounter challenging ascents, including notable hills like Cardiac Hill, K2, Knickerbocker, and Overlook Hill. The event emphasizes a cupless experience, encouraging runners to be self-sufficient.
With a median field size of around 77 finishers, FOURmidable offers an intimate race environment. The event, now in its third edition, is noted for its challenging terrain rather than large crowds or high repeat-runner loyalty, making it a destination for those seeking a rugged trail running adventure.
Race-provided description
Use this page to sign up for FOURmidable trail race starting Feb 20, 2026 up until the start of the race. Simply sign up using your smart phone and the system will automatically add you to the packet pick up roster. After signing up, line up to pick up your bib in the correct line.
Logistics
Race Day
Saturday, February 20, 2027
Start Time
8:30 AM
Giveaway
T-Shirt
Start Location
855 Pacific ave, Auburn, CA, 95603
Course Info
Course Type
Loop Course
Terrain
trail
Scenery
Rural
Surface
Dirt Trail
Difficulty
Hilly
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Course Map
3 other maps for this race
Quality Score
3 years running
~78 finishers a year
growing or steady
0% returning runners
3 timing sources
no finisher data yet
winner 1:58:10
typical high 58°F
Race Day Weather
5-year historical avgStart (Low)
37°
Afternoon (High)
58°
Ideal racing weather — cool and comfortable
0.2"
Precipitation
10 mph
Wind
67%
Humidity
Historical Finish Times
How 299 finishers actually crossed the line across 3 years.
Most recent
2026
Total finishers
299
Median time
3:34:11
Latest turnout
77
States
3
Turnout by year
2017–2026
Hover the histogram to inspect specific finish times.
Frequently asked
When is the FOURmidable?
The FOURmidable is held on Saturday, February 20, 2027, starting at 8:30 AM.
Where does the FOURmidable take place?
It takes place in Auburn, California.
What distances does the FOURmidable offer?
The half marathon (13.1 miles), plus 50K, 35K, 13K.
Is the FOURmidable course flat and good for a PR?
The FOURmidable is a hilly, loop course course.
How many people run the FOURmidable?
HalfRuns has finish records for 299 runners who have completed the FOURmidable.
HalfRuns editorial — independent, no paid placement.
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