UltraSignup
Founded in 2009 by a trail runner for trail runners, UltraSignup is trail running's home for race registration, results and rankings — hosting more than 6,500 events across North America, more than any other platform in the sport. Beyond race registration, UltraSignup produces original journalism, video and podcasts through Trailhead Media, tours the country with its Dirt Circus festival events and stewards the U.S. Trail Running Conference. Find your next race at ultrasignup.com.
At UltraSignup, we believe trails are for everyone. UltraSignup exists to bring the trail running community together to push beyond: further than we thought we could, into the wild places worth standing up for, and toward a bigger future for the sport.
The TransRockies Run Has Found New Life
Over 3 days, TransRockies - Pass to Pub traces a breathtaking point-to-point route in the heart of Colorado’s high country.
UltraSignup
September 14, 2025
Run Rabbit Run: A Steamboat Classic with Heart, Competition, and $100,000 on the Line
Steamboat Springs’ Run Rabbit Run 100 offers over $100,000 in prize money and has donated nearly $600,000 to charity. RD Fred Abramowitz shares what makes this Colorado ultra unique.
UltraSignup
September 4, 2025
Junko Kazukawa on Joy, Grit, and Running Into Her 60s
Breast cancer survivor and ultrarunner Junko Kazukawa shares her journey through 100s, 200s, and running with joy into her 60s.
UltraSignup
September 2, 2025
Sarah Lavender Smith Finds Meaning in Midlife and the Midpack
Writer and ultrarunner Sarah Lavender Smith joins The Trailhead to discuss aging, Hardrock 100, stage racing, and the joy of finding meaning on the trails.
UltraSignup
August 28, 2025
Your Quick Guide to Tapering: Frequently Asked Questions
Learn the science behind perfecting your taper with help from CTS coach, Jim Rutberg.
UltraSignup
August 15, 2025
14 Trail Races Outside of the U.S.
Ready for miles that build cultural connection and shift your perspective? From alpine traverses to volcanic jungles, each of these international trail running experiences offers a chance to create memories that will stay with you for the rest of your life.
UltraSignup
July 28, 2025
Through the Lens: 10 Favorite Captures from a First-Time WSER Photographer
Ever wonder what it’s like to have a media pass at Western States 100? Morgan, UltraSignup’s Partnership Success Manager, took on the challenge for the first time to capture the grit, emotion, and chaos of the iconic race. Here are his top 10 favorite shots and what he learned along the way.
UltraSignup
July 15, 2025
Your Quick Guide to Heat Acclimation: Frequently Asked Questions
Learn about the basics of effective heat training from the experts at CTS.
UltraSignup
June 30, 2025
Humans of the Arizona Monster
Ordinary runners, extraordinary miles inside the Arizona Monster 300, where community, courage, and one step at a time carry people farther than they ever thought possible
UltraSignup
May 2, 2025
Isometric Strength Training: A Safe, Simple, and Effective Path to Better Running
Isometric strength training builds muscle, strengthens and stiffens tendons, and helps prevent injury—making it a powerful, low-skill tool for ultrarunners to train smarter.
UltraSignup
April 14, 2025