FOURmidable 100K/50K/13.1M

FOURmidable 50KFebruary 21st, 2015

Auburn State Recreation Area
Cool Horse Staging Area
2966 State Hwy 49 
Cool CA, 95614

Course | Weather | Aid StationsRules | Travel & Lodging | Race Start & Time Limits | FeesVolunteer | Packet Pickup | Race Day | SponsorsResults



The 100K and 50K are extremely challenging courses with four major climbs and about 8000 feet of climb on each loop.  Starting at Cool Firehouse, the course follows the Western States Trail to No Hands, toward China Bar and Auburn Overlook, to Oregon Bar and up Cardiac, back to Auburn, toward Robie Point, back to No Hands, then up K2, crossing Salt Creek to Knickerbocker Creek, then continuing past Knickerbocker on a five-mile loop to Northside School and back to Cool. The 100K will do the loop twice!!

Auburn Overlook
Old Auburn Damn Site

The Half Marathon goes down to No Hands, up K2 to Knickerbocker and to the dam site, back up to Knickerbocker and back on the paved road to Cool.

Create Maps or search from 80 million at MapMyRun

Create Maps or search from 80 million at MapMyRun

Printable and downloadable maps are available on the MapMyRun FOURmidable page. We suggest you add the MapMyRun application to your smart phone, print a map, or add the .gpx file to your Garmin.

100K/50K Map Half Map



Click for the latest Cool weather forecast.

Sunrise 6:48am
Sunset 5:47pm



Four aid stations are provided along the course, with 100K and 50K runners seeing them a combined seven times per loop.  All aid stations have vehicular access; however, to minimize traffic, crews are allowed at the Overlook and No Hands, only.  Aid stations will supply water, electrolyte drink, gels, salt tablets, soda, and some snacks.

Aid Station Mile Next Aid
Start (Cool) 0 3.75
No Hands 3.75 4.55
Overlook 8.3 3.15
Oregon Bar 11.45 2.85
Overlook 14.3 4
No Hands 18.3 3.6
Knickerbocker 21.9 4.6
Knickerbocker 26.5 4.6
Finish (Cool) 31.1 0

Runners must check in at each aid station.



Read them here  Rules



The best option for air travel is Sacramento International Airport (SMF), approximately 40 miles west of Auburn.  Some airlines fly into Stockton Metropolitan Airport (SCK), approximately 80 miles southwest of Auburn.

There is no host hotel for this event.  Nearby lodging options within five miles of the race start are listed below.  Additional options are available in Rocklin, Lincoln, and Roseville, ranging from 10-15 miles away.  We suggest comparing rates on sites such as or, using zip code 95614 or the full start address.

Holiday Inn Auburn
120 Grass Valley Hwy
Auburn, CA, 95603

Motel 6 Auburn
1819 Auburn Ravine Rd
Auburn, CA, 95603

Comfort Inn Central
1875 Auburn Ravine Rd
Auburn, CA, 95603

Quality Inn
13490 Lincoln Way
Auburn, CA, 95603





Until January 20th, 2015 at 11:59pm:

100K $125
50K $75
13.1M $60


January 21st, 2015 at 12:00am through February 18th, 2015 at 11:59pm

100K $135
50K $85
13.1M $70


Race Day/PPU Registration

100K $140
50K $90
13.1M $75


We will accept registrations at Packet Pickup and Race Morning; however, shirts and sizes are not guaranteed.

You must register by Monday, February 2nd, 2015 in order to be guaranteed a shirt and your requested size.

Race Directors: ERT is happy to offer you comp entry with reciprocal race entry.  Please email us with your request.

Elemental Running is owned and operated by Veterans so we appreciate the service to country. If you are a veteran please CONTACT US and we will be happy to extend you a discount.



Volunteers are an essential element of any race, but especially for trail races. We have some of the best volunteers and we are always looking for some more.

Volunteers earn entry to an Elemental Running race of equal or lesser distance.





02/21/2014 – Race Morning
Start/Finish Area



All participants will receive a technical shirt and a finisher medal (upon completion of the registered event).  Awards will be presented for the top men’s and women’s finishers in each race. Distribution and depth of age group awards is dependent upon participant field.

Winners must be present to receive all finisher awards and raffle prizes. No awards or prizes will be mailed.

Runner instructions will be given ten (10) minutes prior to the race start. Runners are responsible for hearing all instructions, checking the website for updates, and reviewing the participant instructions email that will be sent and posted on Facebook and Twitter no later than Friday before the race.

Gear check will be available at the Start/Finish Area. Runners must mark their items clearly with their name and place them in the gear check area. Gear check is to be used at the runners’ risk; Elemental Running is not responsible for any lost, misplaced, or stolen items.


No need to pay for parking.  Elemental Running absorbs the cost of parking for the event.  Each participant will receive a parking pass with their packet pickup materials; these passes may be given to family, friends, or other spectators. Only one pass is available per runner.

All attendees and those with event passes must park inside the Knickerbocker gate (normally closed at the Cool Staging Area).  After entering, all cars must turn around and park on the south side of the road, facing east, as if exiting.

Any spectators without a parking pass are still subject to pay the $10 entry fee for Auburn SRA, and must park in the parking lot closest to the fire station.  Parking is not allowed in the trailer lot; cars will be ticketed by the rangers.