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FOURmidable
Auburn
,
United States
21 Feb 2026
The FOURmidable trail races offer an exciting challenge that pushes your boundaries while showcasing the stunning landscapes of the Sierra Nevada foothills. It features multiple distances including a 50K, 35.5K, half marathon, and 13K, catering to a range of endurance levels. Participants experience rugged trails and significant elevation changes, making it a true test of trail running prowess.
31.1
mi
50K
31.1mi
6001ft
6001ft
Do you have the GPX data?
If you are the organizer of the race, or you just ran the course already and you have the GPX file, we would really appreciate that you take the time to update our database.
FOURmidable - Find your perfect running pace 31.1 mi
Curious what pace you need for each section of the course to reach your target time based on the elevation profile of the race? Try our pace calculator and discover different scenarios to optimize your FOURmidable race tactics.
Calculated running time
04:10:00
0
km
22
m
4.33
min/km
1
km
102
m
5.12
min/km
2
km
83
m
4.47
min/km
3
km
11
m
4.23
min/km
4
km
26
m
4.32
min/km
FAQ - FOURmidable 31.1 mi
This challenging 50K event, part of the FOURmidable races, features over 6,000 feet of cumulative climbing over four major hills: Cardiac Hill, K2 (Training Hill), Salt Creek Hill, and Overlook Climb. The course includes less than 1 mile of road and offers a true trail running experience through the Auburn/Cool area.
FOURmidable takes place at 21 Feb 2026
FOURmidable takes place in Auburn, United States
FOURmidable: There are a total of 4 courses
The shortest distance available is 8.1 km, and the longest on is 31.1 km
Although there is no general rule for the minimum preparation time, we recommend at least 12 weeks of training for a race like FOURmidable
If you want to prepare for FOURmidable, running.COACH offers dynamic training plans tailored to the requirements. Whether you're training for distance, speed or endurance, we have customized plans to help you reach your full potential on race day.
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Train for 31.1 mi - FOURmidable
FOURmidable - Prepare yourself optimally for your race with running.COACH! Our training plans, supported by artificial intelligence, dynamically adapt to your progress and help you achieve your target time. Whether you're aiming for a personal best or planning a successful finish, structured workouts, precise feedback and intelligent adjustments will keep you motivated and well prepared. Become part of a community that will get you to the finish line stronger than ever before!
What runners say about us?
Said López
running.COACH has helped me plan my entire season for the year. I love the flexibility with which the training plan is adjusted when an annual goal changes. I am very happy with the way it plans my week, the accuracy of the pace and heart rates, and the ease of use of the app. I find the dashboard very accurate and the stats help me keep a clear track week after week. This year my goal is to reach 800 ITRA points at three mountain ultras in Colombia, and I hope to do it with the help of running.COACH.
Karin Stoop
With the training program from running.COACH, I was able to achieve the goal of a "marathon" within a year with a varied training plan that was adapted to my performance. It is impressive how tailor-made this online training program is. My dream of finishing a marathon has come true. The different training units and the noticeable progress are very motivating.
Monika Cremosnik
Thanks to the support of my running.COACH Gold Coach, Stefanie Meyer, this year became my year of success! Intensive and always personalised training plans and always the right words and encouragement have helped me to realise my dreams. I am now a finisher in the ultramarathon in South Africa, the Comrades Marathon.
Silvia Perez
When I started training with running.COACH I found it hard to lower the intensity of each workout. But I continued because I believe that "less is more". With running.COACH I not only continue to improve my times and meet my goals but I feel strong and in very good shape. This is what allows me to finish a competition happy and keep on doing what i like the most: RUNNING!!
Angela Heller
"When I started running again after a long break, it was clear to me that I wanted to train in a structured way. With the reference 'Viktor Röthlin' my confidence grew and I bought my first subscription, a silver subscription. I was enthusiastic from the beginning and my motivation increased from training session to training session. I followed the instructions very precisely and the result for my big goal, the SwissAlpine K43, was correspondingly perfect!"
Christoph Friedli
Thanks to continued training with running.COACH, I was able to clearly improve on distances ranging from 10km to mountain running and marathon in the past couple of years, without risking an injury. Those successes encourage me to aim at new targets time and time again.
Be part of FOURmidable – Join the running.COACH community and take your training to the next level!
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