"Standard distance.
Mammoth vert."
Mammoth Bar
Half Marathon
Details
8:30 am, Sunday, September 7th, 2025.
The cutoff for all distances will be 12:00 pm.
Elevation gain is approximately 4,300 ft.
Where
Start/Finish Location:
Mammoth Bar OHV Area
Old Foresthill Rd, Auburn, CA 95603
(38.918764, -121.001740)
Aid Stations & Finish
Castle Rock Aid: mile 2
F.D.L. Aid: mile 5
Castle Rock Aid: mile 11.3
All Aid Stations will be well-stocked with water, electrolytes, sodas, energy gels and/or chews, salt, bananas, & various other typical snacks.
Finishers will receive a yummy finisher meal (vegetarian option).
Please also note that, in the interest of being environmentally friendly, this is a cupless event, so be sure to carry a reusable cup or water bottle.
Course Data
The course will be well marked but, sadly, course marking sabotage does happen. It is recommended that runners have the course map downloaded in advance of race day to their phone or other GPS device.
Course Maps & Elevation Profiles
(For CalTopo elevation profile, select route line on map > select Profile.)
Strava CalTopo Gaia
AllTrails GPX download
UltraPacer (Define your pacing strategy.)
Swag
Runners will receive t-shirts (if ordered during registration) and unique finisher medals at the finish line. Additionally, awards will be given to first through third place male and female finishers, per distance.
Rules and Regulations
Finally, if you do sign up, please abide by all rules and regulations, which can be found here.
And don't forget to have fun out there and look around! It's beautiful!