Saturday, Aug 3, 2024 @ 5:00 AM

Angeles Crest 100 Mile Endurance Run

Wrightwood, CA 100 Miler

Registration Closed Sat. Jun 1, 2024 @ 11:59 PM

Welcome runner,

The Angeles Crest 100 Mile Endurance Run has been held since 1986. It is one of the original five 100-mile races and is a point-to-point course between Wrightwood and Altadena, with elevations ranging from 1,135 to 9,300 feet. The race has maintained its original course over the years, making it one of only six point-to-point 100 milers in the United States. Runners who participate in this race will cover 100 miles of the San Gabriel mountains, encountering steep climbs and rocky terrain along the way.

AC100 is not easy but every finisher knows that the journey is worth it. The San Gabriel backcountry provides a stunning backdrop for the race and the course presents a challenge. For those who are up to the challenge, the 34th Annual AC100 offers an opportunity to test their limits. The training runs and trail workdays leading up to the race are just as important as the race itself, providing a chance to build friendships and improve the trails we all enjoy.

Preparing oneself physically and mentally for the race is crucial, but the experience of running through the high alpine ridges of Baden Powell, the rocky trails of the high country, the deep canyons surrounding Mt. Wilson and the Mt. Wilson Climb itself makes it all worth it. Despite the immense challenge, there are special moments to be found in this race. Take the time to savor them and make the most of this unique experience. If you're interested in taking on this challenge, mark your calendar for the 34th Annual AC100, which will be held on August 3, 2024.

The only way to register for the 2024 AC100 is through the waitlist. You can view the waitlist by clicking the button below.

rules for waitlist
  • To sign up for the Waitlist, you must have an UltraSignup account with a valid payment method.

  • All Waitlist entrants will have to run a 50+ Mile Race between July 31, 2022 and July 13, 2024. The result of your qualifying run must be published in a magazine like Ultra Running or on UltraSignup's website. It’s part of the entry process and is required once you are selected.
  • If a runner drops, a runner from the Waitlist will be invited to fill that spot. You will have the option to accept or decline before your credit card is charged.
  • We will continue to add Waitlist runners to the race until June 1, 2024.
  • All runners in the race are required to complete and submit Trail Work between April 1, 2023, to July 13, 2024. Runners who do not complete the Trail Work, will not be allowed to start the Race.
  • Signing up for the SOLO division means that you will have no pacer(s) and no crew support during the race. Switching divisions is not permitted after signup.

2024 refund policy
50% up until march 1.
25% up until june 1.

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

2024 course changes
In 2024 the course will bypass Chantry Flats because of the extensive damage from the Bobcat Fire and winter storms. The 2024 AC100 will 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 to Redbox, from Redbox it will take the Gabrielino Trail to the Kenyon/Devore Trailhead on the Gabrielino Trail and take the Kenyon/Devore Trail to the top of Mt Wilson and on to Idlehour, Sam Merrill, Millard and Loma Alta Park in Altadena.


Completing the AC100 race is an outstanding accomplishment. The Awards Ceremony that follows is an event worth experiencing. Take pleasure in celebrating with your fellow runners and families. If you complete the race in less than 33 hours, you will receive an official AC100 Finisher's tech t-shirt and a bronze buckle. During the award ceremony, every finisher will be recognized with a personalized engraved plaque bearing their name and finishing time.

the buckles
  • All Finishers get a Finisher Plaque with there Name and Finish Time engraved on it as they cross the Finish Line.
  • All Finishers get a Finisher T-shirt. The Solo Finisher gets Solo Finisher T-shirt.
  • Runners who cross the Finish Line in less than 24 hours receive the Solid Sterling Silver Buckle.
  • All Runners finishing between 24 and 24:59:59 hours receive the Solid Bronze Second Sunrise Ram Buckle.
  • Any Runner who completes the race between 25:00 and 33:00 hours is awarded with the 33 Hour Solid Bronze Ram Buckle.
  • Solo Finisher who finish in Sub 24 hours receive the 24-Hour Solo Solid Sterling Silver Buckle.
  • All Solo Finishers between 25:00 and 33:00 receive the 33 hour Solo Solid Bronze 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 17:35:48 run in 1989, a record that has stood for 34 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 trophies
  • 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.
  • The Eagle: Any runner officially finishing 10 consecutive Angeles Crest 100-mile Endurance Runs.
  • The Grizzly: Any runner officially finishing 20 consecutive Angeles Crest 100-mile Endurance Runs.

Coros Code: AC100 For Free Accessory w/ Purchase
Hammer Discount Code: AC100HN25

Thank you for supporting AC100
Best Regards,

Ken Hamada
Race Director

Event's current local time: 1:39 PM PT


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