The Ring



and Trail

Race Book

First Timer

Race Day LIVE
RACE STARTS IN 182 days (8/1/2015)
RACEBOOK(pdf): 2011201220132014



The Ring
The Ring is no longer available.

50 Mile Qualification Requirement
Finish a "50 mile run" between now and August 1, 2015 and enter the official results in the AC100 Database using your ID (email address) and PW (that you created when you entered the race on-line).

New Pacer Rule
Pacers will only be allowed at Chilao and only one pacer per runner starting at Chilao. No new pacer will be allowed after Chilao. No new pacer will be allowed at Shortcut, Newcomb and Chantry.

Race Disputes
Race disputes must be presented prior to the Award Ceremony. Once the Race Director presents the runner their Award, then the results are official.

Lost Awards
AC100 Awards are not for sale. If you lose an Award (buckle, plaque or bronze award) you cannot buy a replacement award from the race. The only way you can get an award is to finish the race and receive the award at the Award Ceremony.

New Vehicle Rule: Only One Car Per Runner.
1) Only one car per runner on the course, including Wrightwood and Loma Alta Park.
2) Vehicle ID: every runner will be issued a "car pass" that will have: runners name, bib number and drivers name on it.
3) Penalty: we will hold the runner for 10 minutes where the vehicle infraction occurs or at the next aid station, if the runner has already left.

Rule for runners that drop at remote wilderness checkpoint
Remote wilderness (Newcomb, Idlehour, Sam Merrill and Millard) checkpoints leaders that lead checkpoints that are behind locked gates are required to insure the health and safety of the dropped runner and to take the dropped runner out of the area the following morning when the checkpoint closes while continuing to assist other runners that are in the race.

2016 AC100 On-Line Registration
2016 on-line registration will begin on Monday 12:00 Noon on August 3, 2015, following the conclusion of the 2015 race.
1) For those that want to run the race solo (no crew, no pacer, no cars on the course) will be able to enter the race one hour earlier (11:00AM) then the rest of the runners. We will take at least 50 solo runners. The "I agree to run Solo" icon will "pop-up" at 11:00AM.
2) For the rest of the runners, normal registration will begin at 12:00 Noon. The on-line registration icon will "pop-up" at 12:00 Noon.

The Solo Runner
The Solo Runner is a runner that runs the race without a crew or a pacer and does not have any support vehicles on the course except one car at the Start (Wrightwood) or at the Finish (Loma Alta Park).

Documents you need to read to run this race:

1) Application sign up on-line. Click on Apply Now button on top of page.
Enter your e-mail address and
Create a new password
2) Sample Application
3) Flow Diagram for Qualification and Trail Maintenance
4) Dear Runner letter
Welcome runners to 2014 race
Schedule of events
Drop bag pickup in WW on Friday at 12:30PM
5) Runner Log On:
Click on the Log In button at the top of the page.


If you are involved in mountain trail endurance running, you know it takes a small army of volunteers to put on a "point to point" 100 mile endurance run.

We need:
1) help at several late wilderness aid stations:
-Idlehour Checkpoint at 83 miles,
-Sam Merrill Checkpoint at 89 miles and
-Millard Checkpoint at 95 miles into the race.

2) help staffing our kitchen at the Finish Line at Loma Alta Park in Altadena.

3) medical volunteers as part of the new Ultra Medical Team, i.e. Paramedics, Nurse, EMTs, First Aid. Everyone that volunteers with the Ultra Medical Team is covered for professional liability (a.k.a. medical malpractice) insurance. Go to to the SignUp tab where you can read about the Ultra Medical Team.

4) help trail marking

5) help trail sweeping (preferably with HAM radio).

6) experienced trail maintenance people that can lead large AC100 Trail Maintenance teams on the weekend starting in early April through middle of July.

If you are available on August 1/2, 2015 (Sat/Sun),
Please contact:
Any help will be appreciated.

For detail information on race including: course maps and profiles, cutoff times, rules and regulation:
2014 AC100 Race Book and
2013 Official AC100 Video

are both posted on the top right corner of the website.

For all future race dates click on the box: "click for entire message".

Parking at Loma Alta Park during the race.
The biggest challenge of putting on the race is controlling where we park vehicles during the race. Parking at Chantry and Loma Alta Park was never intended to handle vehicle from 150+ runner/crew/pacer. In order to minimize the parking problem we need your help. As the race grows in popularity, vehicle parking problem will also grow unless we try to fix it before it becomes a major problem.
Loma Alta Park: DO NOT PARK your vehicles in the following areas:
1) parking lot off Palm Street just South of the restrooms. This parking lot is only for Run Management. We need parking spaces close to the park to put on the race. We are only allowed to reserve 15 parking spaces. The rest are not posted and available for general public use. However, we need all of the parking spaces, even if it is not posted.

2) on Palm Street in front of homes. This for residential parking only.
When I apply for a permit to use the park, the residents complain to the park administrator that during race weekend, they cannot park the vehicles in front of there house on Thur, Fri, Sat and Sun. I tell the park administrator that i am working on it.
The future of the race depends on runners and there crews parking on Lincoln Ave, Loma Alta Drive and Sunset Ridge Road. There are two large parking lots off Sunset Ridge Road next to the baseball field and the pool area.
If I cannot get a permit to finish at Loma Alta Park, the race may be terminated, unless I completely redo the course from point-to-point into a multi-loop type race because there isnít any other reasonable place to finish the race and maintain the point-to-point format.


2011 AC100:
Runners on Mt Baden Powell at 9300 ft elevation

Comparing 100 Mile Races

Click on the Image for a Larger Picture

Angeles Crest 100 mile endurance run

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.

Those desiring to see this primitive wilderness in a single day are invited to participate in the Angeles Crest 100 Mile Endurance Run.

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