Saturday, Jul 22, 2023 @ 7:00 AM

Kirkwood’s Thunder Mountain Trail Challenge

1501 Kirkwood Meadows Drive

Kirkwood, CA 50K, Marathon, 30K, 25K, Half Marathon, 8 Miler, 10K, 5K

This Event Took Place Sat. Jul 22, 2023

About the Race

This course is extremely challenging. The course starts at the Kirkwood Lodge and runs on pavement for around 0.2 miles leading to a single track trail, then from there it is all singletrack going up. If you like the High Sierra and are into an incredible challenge, please come and play on Thunder Mountain. You will absolutely love this new event.


Active military & first responders receive a 15% discount. Entry fees are non-refundable.

Race Day Registration Available on July 22nd.

Please reach out to for veteran discounts and/or mail-in registration.

Bib Pick-Up and Race Day Registration takes place race morning.


6:00 AM: Runner check-in at the Kirkwood Mountain Ski Resort / Red Cliffs Day Lodge - 1501 Kirkwood Meadows Dr., Kirkwood, CA -
6:45 AM: Pre-Race runner briefing at Start line, hosted personally by Troy
7:00 AM: Race start for all distances.

Course/Race Information

Course/Race Information
Race starts at the Red Cliffs Day Lodge next to Kirkwood Lodge at 7800 feet in elevation, and some of the distances will go up to about 9500 feet. Overall time limit: 12 Hours.

RACE START / FINISH ADDRESS: 1501 Kirkwood Meadows Dr., Kirkwood, CA

Bib Colors:

50K, Marathon – Yellow bibs
30k, 25k, Half Marathon – Red bibs
8 Mile, 10K, and 5K – Black bibs


5K Course -
10K Course -
8 Mile Course -
Half Marathon Course -
25K Course -
30K Course -
Marathon Course -
50K Course -


All runners receive a medal for finishing the race.


Results are posted on UltraSignup the evening of the race.

Drop Bags

Collection area at Kirkwood. 50K Drop Bags will be available at the Thunder Mountain Aid Station at Miles 4 and 27.2

Directions and Parking

Directions leaving the the Start and Finish for the event:

Attention Crews – be very careful driving on Hwy 88. If you need to walk across Hwy 88 for any reason, use extreme Caution.

You will have access to the Thunder Mtn Trail Head aid station – Directions.

Turn Left West onto Hwy 88. Drive less then one mile the Thunder Mtn Trail Head aid station will be on your Left located in a dirt parking lot.


Kirkwood Mountain Resort can be reached directly at (209) 258-6000

More Info

Phone reception for runners and crews:

AT&T and cell phone reception is great inside Kirkwood.
For the runners out on the course, once gaining some elevation up on Thunder Mtn, cell phone service is good in lots of locations.
No cell phone reception at both of the aid stations.

Event's current local time: 11:42 PM PT


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