The Angeles Crest 100 Mile Endurance Run, or AC100 is a 100 mile Ultramarathon. It takes place in the The San Gabriel back country and 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.
It has been run 33 times, and every iteration of the course has pushed competitors to their limits. From the fastest runners to the slowest, no runner has arrived at the finish without dealing with their fair share of hardship. Accordingly, no entrant in the 34th edition can expect a day without some adversity.
The race is much more than just 33 hours of running, and we implore all runners to enjoy the journey in training and preparation for race day. The trail work days provide a hands-on opportunity for runners to improve the environment they will be tested to their limits. The training runs offer supported point-to-point time trials to test race plans and build camaraderie with fellow competitors. Make the most of your time before the race to prepare and develop yourself. Enjoy the process, and find a way to thrive on the high alpine ridges of Baden Powell, the rocky trails of the high country, the deep canyons surrounding Mt. Wilson, and in 2023 the Mt. Wison Climb itself.
There are special moments wrapped inside the exhaustion; savor them.
AC100 is one of the first five 100-mile endurance runs in the United States. As of November 2022, There are 217 100-mile races. AC100 is one of only six point-to-point 100 milers. The first edition was held in 1986. Since then, the course has remained mostly consistent. The original finish line was the Rose Bowl in Pasadena through 1991. In 2008 the finish line was moved to Loma Alta Park, in Altadena.
2023 Course Changes
In 2023 the course will bypass Chantry Flats because of the extensive damage from the Bobcat Fire and winter storms. The 2023 AC100 is to finish in Altadena via Kenyon/Devore Trail to the top of Mt Wilson, bypassing Chantry. The race will pass through Shortcut, Redbox and Newcomb Saddle, but after Newcomb Saddle, it will go back on the Rincon-Redbox Rd/Gabrielino Trail toward Redbox, but take Kenyon/Devore Trail to the top of Mt Wilson and to Idlehour, Sam Merrill, Millard and Loma Alta Park in Altadena.
One of the highlights of the AC100 is the Awards Ceremony immediately following the conclusion of the race. Yes, it can get a little long, but this is because every finisher is recognized for their great accomplishment. So bring a cooler of cold beverages and lounge in the shade of the park while you celebrate your fellow compatriots. All runners finishing before the 33-hour cutoff will receive an official AC100 Finisher’s tech t-shirt. Solo runners will receive a special solo version. In addition, all official finishers receive an engraved plaque, personalized with his/her name and finishing time at the award Cermony.
Runners who cross the finish line in less than 24 hours receive the Silver Belt Buckle.
All runners finishing between 24 and 24:59:59 hours receive the Second Sunrise Ram Buckle, made of solid bronze.
Any runner who completes the race between 25:00 and 33:00 hours is awarded with the 33 Hour Ram Buckle. Additionally, all finishers regardless of finishing time get an engraved metal plate mounted on a solid walnut plaque and a finisher T-shirt.
Solo Runners who finish in sub 24 hours receive a Solo version of the 24-Hour Solid Sterling Silver buckle.
All Solo Finishers between 25:00 and 33:00 receive the 33 hour Solid Bronze Solo Ram Buckle.
Any female runner who breaks the existing female course record of 21:04:18 receive the 24-Hour Solid Sterling Silver / 14K Gold Rejoice buckle.
Any runner who break the existing Male course record receives 24-Hour Solid Sterling Silver plated in 14K Gold.This requires besting Jim O’Brien’s stout 17:35:48 run in 1989, a record that has stood for 28 years! The closest anyone has come to this record is within 56 minutes, and only three other runners have ever broken the 19-hour mark. Both men and women are eligible for this award - any person who breaks the time, wins the gold buckle.
The Ram : Presented to the Overall Male and Overall Female winners.
The Cougar: Presented to the First Male Solo and First Female Solo runners.
If the Overall winner also ran in the Solo division, The Cougar will be presented to the next Solo finisher.
The Elk: Any runner officially finishing 10 AC100 races, over any time period, in any official finishing time.
The Eagle: Any runner officially finishing 10 consecutive Angeles Crest 100-mile Endurance Runs.
The Bear:Any runner officially finishing 20 consecutive Angeles Crest 100-mile Endurance Runs.
Entry Process / 2022 Lottery
Due to high demand and limited space in 2018, we switched to a lottery system. The 2022 AC100 lottery for the 2023 AC100 was held on 12/5/2022-12/12/2022 on UltraSignUp. We accepted 280 runners, and are maintaining a 75-person waitlist. We will continue to add runners to the waitlist throughout the year. Partial refunds are being offered to registered runners who withdraw before June 1st. With the lottery system, a well-maintained waitlist, and registration on UltraSignUp, we are looking forward to seeing more runners on the starting line at Wrightwood. We plan to keep this process for future years and will provide online communication via emails, our website, and our Facebook Group.
FOR 2024 AC100
The 35th Annual Angeles Crest 100 will be on July 27, 2024.
Lottery registration will be on November 24, 2023, through December 8, 2023.
Runners that are entered in the 2024 AC100 will be announced on December 15, 2023.
There will be 230 spots for the Lottery. The roughly 30 remaining spots are reserved for volunteers, sponsors, and Sterling Silver Ticket Winners.
Siging up for the SOLO division means that you will have NO PACER(S) and NO CREW support during the race. NO switching divisions is permitted after signup.
Event's current local time: 11:43 PM PT
1) All Lottery entrants will need to have run an Official (i.e. timed race with published results) 50+ Mile Race in the past 12 months in order to register for the Lottery.
2) There will be 270 spots for the Lottery. The roughly 30 remaining spots are reserved for volunteers, sponsors, and Sterling Silver Ticket Winners.
3) Runners that have consistently entered each year and not been drawn in the AC100 Lotteries will be given an extra ticket for each year they have not been selected.
4) Runners will get 1 more ticket for each year they have finished AC100.
5) Solo Runners will get 1 more ticket, and are eligible for special Solo Division Awards, Buckles, and T-shirt.
6) A Wait List of 75 runners will also be pulled automatically. We will add Wait List runners to the race until June 1st.
7) If you are on the Wait List, you will automatically be charged the Entry Fee whenever a runner drops from the Start List. If you do not want to be charged, please drop from the Wait List on your UltraSignUp.com profile under "Registration History - Edit".
8) All runners in the race will complete Trail Work by July 15th.
9) Refunds for all runners: 50% up until March 1st, 25% up until June 1st.