The San Gabriel back country retains much of the natural beauty, if not the primitive wilderness of yesteryear… Thanks largely to the foresight and capable supervision of
the U.S. Forest Service and hundreds of volunteers. Picnic areas and campgrounds
have been constructed with minimum displacement of the natural setting.
The Trail Work Day scheduled for Sunday, May 30, 2026 is on. Meet at the Switzer Picnic Area at 7AM.
Highway 2 closures and the effects of the Eaton Fire have required a new out-and-back course for 2026, starting and finishing at Loma Alta Park. Read the 2026 Race Status Update →
Registration and drop-bag collection will take place Friday, October 2. The race starts at 5:00AM Saturday, October 3, at Loma Alta Park. View the Race Weekend Schedule →
Review the 2026 out-and-back course from Loma Alta Park to Mt Hillyer and back. View the Course Map and Elevation Profile →
View aid-station mileage, runner times, crew and pacer access, drop bags, and official cutoff times. View the Checkpoint Cutoffs →
Two races now offer automatic entry into AC100 2026.
Top 2 male and top 2 female finishers qualify:
That’s No Moon 50 Miler
September 20, 2025 – Silverado, CA
Pacifico Ultra 50K
May 30, 2026 – Angeles National Forest, CA
July 26, 2026 at 7:00AM
Trail work between Newcomb Saddle and Sturdivant Camp. Meet at Chantry Flats at 7:00AM.
August 2, 2026 at 7:00AM
Trail work on Upper Winter Creek between Hogee and the “bench.” Meet at Chantry Flats at 7:00AM.
August 9, 2026 at 9:00AM
Trail work on Mt Wilson Toll Road. Meet at the top of Mt Wilson at 9:00AM.
August 16, 2026 at 7:00 AM
Trail work @TBD. Meet at TBD.
Trail workdays generally conclude around 3:00PM after completing eight hours of work. Advance registration is required.
To reserve a spot, contact Ken Hamada at ken.hamada3@gmail.com.
CTS Ultrarunning Coach Martin Torres will lead a free, three-day training camp on the 2026 AC100 course August 22-24. Registered AC100 runners may attend one, two, or all three days. Together, the runs will cover more than two-thirds of the course.
To register, RSVP through the INCLINE training group on Strava or contact Martin directly at MTorres@trainright.com.
Please note: Runners must be self-supported and carry appropriate gear, fuel, and hydration.
If you’re interested in HAM certification or want to volunteer please visit the Ham Radio page.
2025 AC100 Course Photos. Photos: Olrando Baez.
2025 AC100 Course Photos. Photos: Paksit Photos.
2025 AC100 1st Place Finisher. Photos: Bernard Falki
The 36th Annual AC100 is scheduled for October 3, 2026.
We’re excited to announce That’s No Moon as the newest Sterling Silver Ticket Race for AC100 2026.
The top 2 male and top 2 female finishers in the 50 Miler on September 20, 2025 in Silverado, CA
will earn automatic entry into AC100, bypassing the lottery.
Learn more on the event page.
Join the Wednesday Night Run Crew for a special Mount to Coast demo run on Wednesday, August 27. It’s a great chance to test out the new trail shoes and connect with fellow runners.
Location & Time: See Run Republic’s Strava page for details.
Exclusive Discount: Use code AC100MTC at mounttocoast.com for 15% off, valid through September 30.
If you’re interested in HAM certification or want to volunteer please visit the Ham Radio page.
2025 AC100 Course Photos. Photos: Paksit Photos.
2025 AC100 1st Place Finisher. Photos: Bernard Falki
