FOURmidable

Trail Running covering 13 km to 50.1 km with up to 1,650 m D+ in Auburn (California, United States)

Location

Auburn, California, United StatesShow on map(38.8966° N, 121.0769° W)

Date & StatusDate to be announcedDate TBA

First edition2013

Elevation gainUp to +1,650 m

FOURmidable is an endurance sporting event in Auburn, California, US focused on Trail Running. First held in 2013, the event is an established fixture on the endurance calendar. It is part of UTMB Index Races. Key features include Forest, Nature & Off-Road, Lakes & Ponds, Mountain.

The race program comprises 4 competitions, including 50k (50.1 km, +1,650 m D+), 35 K (35 km, +1,140 m D+), Half Marathon (21.1 km, +713 m D+), and 13 K (13 km, +353 m D+). The exact date for the next edition is currently open and will be announced by the organizer. Official race regulations, course details, and registration information are provided on the organizer's website (singletrackrunning.com).

Official website

FOURmidable in Auburn (Work: "Ute Trail, Rocky Mountain National Park", Photo: NPS, License: Public Domain, Source: Wikimedia Commons) — "Ute Trail, Rocky Mountain National Park" · Photo: **NPS** · Wikimedia CommonsPublic Domain
Cropped to 16:9 (960 × 540 px), WebP

Event characteristics

Forest Nature & Off-Road Lakes & Ponds Mountain High Altitude

Races & distances (4)

Competition	Discipline	Distance	Elevation gain	Altitude range	Course type	Course & profile
50k	Trail Running	50.1 km	+1,650 m	1,150 m - 1,843 m	Loop course	Route & profile
35 K	Trail Running	35 km	+1,140 m	1,153 m - 1,632 m	Loop course	Route & profile
Half Marathon	Trail Running	21.1 km	+713 m	1,156 m - 1,455 m	Loop course	Route & profile
13 K	Trail Running	13 km	+353 m	1,159 m - 1,307 m	Loop course	Route & profile

Course & Elevation Telemetry

Course route & map

Distance

50.1 km

Elevation gain

+1,650 m D+

Elevation loss

-1,650 m D-

Altitude range

1,150 m - 1,843 m

Gradient (Avg / Max)

6.6 % / 11.9 %

Course format

Loop course

50.1 km+1,650 m D+Peak 1,843 m

Start (S)Finish (F)DownhillFlatClimbSteep

Elevation profile & course telemetry

Altitude from 1,150 m to 1,843 m above sea level (+1,650 m D+, -1,650 m D-)

Peak: 1,843 m·at 14.3 km·Ø 6.6 %

Event Information & Answers

Frequently asked questions (FAQ)

When and where does FOURmidable take place?

FOURmidable takes place in Auburn, California, US (start area at coordinates 38.8966° N, 121.0769° W). The exact date for the next edition is currently open and will be announced by the organizer.

What races and distances are offered at FOURmidable?

The race program comprises 4 competitions, including 50k (50.1 km, +1,650 m D+), 35 K (35 km, +1,140 m D+), Half Marathon (21.1 km, +713 m D+), and 13 K (13 km, +353 m D+). The competitions belong to Trail Running.

What is the course layout and elevation profile for FOURmidable?

The main competition (50k over 50.1 km) is designed as a loop course featuring +1,650 m of elevation gain and -1,650 m of elevation loss, ranging between 1,150 m and 1,843 m above sea level. An interactive course map with route visualization, elevation profile, and GPX export is available in the course section on this page.

Where can I find registration and official race rules for FOURmidable?

Official race regulations, course details, and registration information are provided on the organizer's website (singletrackrunning.com).