Are you ready to take on the challenge?




Sunday February 18, 2018 - New date and start time

8:00 am (35k)


Overlook Park, Auburn CA

Google maps to start

855 Pacific Ave,
Auburn, CA 95603


Use the link below, or mention the SingleTrack Running block when calling.



The 35K has over  4,000 feet of vertical gain.

While the name FOURmidable comes from the four major climbs along the course in the 50k, the 35k shares 3 of those 4 major climbs. Runners will run towards the famous No Hands Bridge on their way out and climb up  K2 (aka-Training hill) towards the top of Knickerbocker Canyon  to then descend all the way down to the river. At which moment runners will be right on the other side of the American River canyon from the START area. Runners will then climb up the switchbacks back to the Knickerbocker AS to then cross Knickerbocker creek on their way towards Cool AS and then follow the Western States trail towards No Hands AS and on their way up to the finish.

Three hills found in the 35k:

  1. K2 (AKA Training Hill)
  2. Knickerbocker (Old Auburn Dam Site)
  3. Overlook hill
  4. Cardiac hill

Less than half mile of road on any distance.

What’s Included

Major Swag

All of STR events are filled with goodies and custom bibs, while we know the killer hills and post race party with plenty of food will make you want to sign up again, we celebrate your finish with major swag. Each STR race has a little different swag because we know nobody needs 14 beer pints, or 12 tshirts.

Aid Stations

All of STR events are full of great aid station with the best available volunteers. The volunteers will help you fill up your bottles and quickly move toward the finish line. Depending on your event distance, our aid stations may include soda, boiled potatoes, candy, gels, electrolyte, salt tablets, and much more.

Cupless Event

Each runner is responsible for bringing their own reusable cup or water bottle. Reusable cups are small, are no problem to carry along while running and will save thousands of cups from being trashed, and possibly blown away littering our beautiful trails. We will have some small collapsible water containers for sale at the event, or we recommend you purchase one in advance at your local running store or online at HydraPouch.


  • Awards will be presented the top Three (3) places overall in male & female field.
  • Age Group awards will be presented only to the top runner in each of the following age groups:

19 years old and under
20 to 29 years old
30 to 39 years old
40 to 49 years old
50 to 59 years old
60 to 69 years old
70 + 



While most AS have vehicle access, spectators are only allowed at No Hands AS, Cool AS, and Auburn.



Aid stations will supply water, electrolyte drink, gels, salt tablets, soda, some snacks, and of course, boiled potatoes.

The cut off times below are strict at the aid stations. The total distance has a soft cutoff time of 6:30hrs, which means that as long as you make the strict cutoff time at No Hands bridge, you will be counted as a finisher, even if it takes you over 6:30hrs. 

Strava shows a total of 4,352 feet of climbing on this course. Mapped with Garmin 220

Aid Station Mile Next Aid Spectators Cutoff
Start (Overlook Park) 0 4.20 YES ----
No Hands AS 4.2 3.8 YES ----
Knickerbocker AS 8.0 4.6 NO ----
Knickerbocker AS 12.6 5.4 NO 11:18am (15:45 minute/mile)
No Hands AS 18.0 4.0 YES 12:48pm (16:00minute/mile)
35.5K Finish (Auburn) 22.0   YES   

Note: Runners must check in at each aid station. All cutoff times will be enforced.



Are you ready to take on the challenge?