San Diego 100-Mile Endurance Race

SD100 made it onto the cover page of Ultrarunner magazine!!!!

If you have a subscription, you can read Angela and BJ’s article here.

Howie Stern’s official race photos can be viewed here:

To purchase a five- or ten-photo download package at a savings, click on the buy option, “add package”, choose your option, then choose your photos. You can choose from multiple galleries by clicking the root directory in the top left of the picture chooser box(2023 San Diego 100) and then choosing another gallery.  Unfortunately, the website doesn’t work on mobile phones – you must use computer.

Thank you to all runners for joining us for our little fiesta last weekend. You fought off last-minute course changes, giant flies, wet feet and for you finishers, the Great Bog Monster of 2023 (we warned you it would be terrible). We hope – whether you made it 10 miles or all 100 – that you had a rewarding and fun experience and that you will join us next year as a runner or a volunteer. Speaking of which . . . 

An even bigger thank you to all of you volunteers! We literally could not do it without you. We brag about you all the time, and yet you always exceed the expectations we create. Thank you for all you do to help these runners chase their dreams. Your energy, experience, hard work, and love for the sport and the runners continues to inspire both us and the competitors. 

We hope that we will see you all back for 2024 . . .

The Premier 100-Mile Running Event in San Diego!

Scenic & Challenging 100 Miles in Mt Laguna Recreational Area and along the Pacific Crest, Noble Canyon, and Lake Cuyamaca Trails. The 21st annual event will begin: Friday, June 7th, 2024, at 0600.

Registration for the 2024 race will open January 1 at 12:01 AM. If you have any questions, please contact us at Thanks, and see you in 2024!

A Must-Read for SD100 Participants: Walter Handloser’s 2018 SD100 Race Report

Qualification requirements to enter the 2024 event are as follows:
Applicants must have completed an official 50-mile race in 13 hours or less or a 100k or 100-mile race between January 1, 2022 and March 15, 2024. If a lottery is required, priority will be given to those runners who have completed their qualifying race. Should there be a lottery, runners signing up during the lottery signup without a qualifier will be placed on the waitlist and will keep their place on the waitlist and/or be granted entry pending their completion of the qualifier. No lottery has been necessary since the race expanded its field to 300 runners, but last year we were full by January 10, so we encourage you to sign up early. SURF members of at least 3 months of good standing receive an extra ticket in the lottery should one be necessary. Volunteers who gave 6 hours or more to the race the prior year receive a lottery bypass. The race directors reserve the right to grant up to 10 entries to runners who have performed outstanding work for the SD 100 or contributions to the field of trail running.

We will accept applications on Ultrasignup beginning 1/1/2024 through the deadline of midnight of 1/4/2024. A lottery will take place if over 300 qualified applications are received. If there are fewer than 300 applicants, entries will reopen on Ultrasignup on 1/5/2024 until the 300-person limit is reached. A waitlist will be maintained on Ultrasignup once the field limit of 300 is reached. The latest date for waitlisted applicants to receive a slot is April 15, 2024. After that date, there will be no refunds for entrants, and no other applicants will be accepted.

All entrants are required to perform 6 hours of volunteer work within the year prior to the start of the 2024 race as a requisite to participate or donate $100 to San Diego 100 to support the TrailFit Program in lieu of their volunteer hours. We encourage entrants to volunteer through trail work on your local trails or the trails in the Mount Laguna District of the Cleveland National Forest where the San Diego 100 is largely run, but volunteering at an ultra or other race is acceptable. Please see our volunteer page for further information.

SD 100 is a Cupless event.

San Diego 100 operates under permit on the Cleveland National Forest.

“USDA and the San Diego 100 is an equal opportunity provider, employer, and lender.”

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