Thinking about running your first 100-mile race but not feeling confident?
Find a pacer to make it a little easier and a lot more fun!
Running 100 miles is tough, but you don’t have to do it alone. A pacer can keep you motivated, on track, and moving forward when things get tough.
Connect with experienced runners who can guide you through the highs and lows of your race!
Become a Pacer
Having completed a 100-mile (or two), you know what it takes.
Help fellow runners achieve their goals by pacing or crewing!
Pacing is more than just running alongside—it's about motivation, strategy, and support.
Share your experience, help others push through the tough miles, and be part of their success story!
Connect with Runners
Looking for a few fellas to be part of your next big trail adventure out there?
Share your event and connect with other runners to make it happen.
Running is better together!
Find training partners, crew members, or pacers for your next big race.
Share your plans, connect with like-minded runners, and turn solo adventures into unforgettable experiences.
Run Square is all about bringing runners together!
Whether it’s pacing, crewing,
offering a place to stay, sharing tips, helping with transportation, or providing moral support, there’s
always a way to lend a hand.
This is your place to connect and make a real difference in a
runner’s journey.
Inspired to join the Run Square community? See how it works and get ready to connect!
See Run Square in Action
Check out these screenshots to see how Run Square helps runners connect and achieve their goals.
Ready to take your running to the next level? Download Run Square today and start your journey!
From the Blog
Check out our latest articles below, and visit our blog for even more.
Check out these top picks for your next running challenge.
Leadville Trail 100
Sat, Aug 16, 2025 • Leadville, CO
This is it. The Race of All Races. Where it all began.
Across the mighty peaks of the Colorado Rockies, a legendary wind whistles. Immersed in 10,000+ feet of Cloud City magic, Leadville calls.
Pacers can pick up their runners at any point on course beginning at Twin Lakes inbound at mile 62.
You may have as many pacers as you wish, although only one pacer at a time (until mile 99).
Pacers may act as burros, to carry food and equipment for their runner.
Pacers are not allowed to push, pull, carry or tow the runner.
The Oregon Cascades 100 is a point-to-point 100-mile trail race from Bend to Sisters, Oregon, with 10,700 ft of gain. The event features 90% single-track trails and 13 full aid stations.
PACERS
All pacers must sign a waiver.
The Mogollon Monster 100 is a rugged, challenging trail race taking place about 90 minutes northeast of Phoenix, Arizona just outside the small town of Pine, Arizona. The Mogollon Monster includes the advanced degree endurance race of 100 miles, with the addition of a 42 Kilometer race on Sunday.
You are allowed ONE (1) crew vehicle per runner. When you pick up your bib, you will be supplied with a crew pass with your bib number on it that must be present on the dash for the entire race.
The Mogollon Rim itself poses a large obstacle for crewing this race. We have learned over the years that it does not make sense or is actually close to impossible to drive between some aid stations in time to see a runner since you must drive all the way around the rim to go up or down it. While most are easily accessible, they often require a great deal of driving to get to each. We ask that you please abide by our crew locations so that we can all have a safe and enjoyable race experience.
This scenic, mountain course runs around the northern half and western edge of the Paunsaugunt Plateau, offering spectacular views above and below the hoodoos. The race is run at high elevation, with most of the miles on this rugged course between 7,000 – 9,000 ft.
60K Ultra: Crew only allowed
50 Mile Ultra: Crew & pacers allowed
100 Mile Ultra: Crew & pacers allowed
Multiple pacers allowed over duration of race.
One pacer allowed on course at a time.
2-3 crew members allowed at aid stations at the same time.
Local Race Director, Kenny Ringled is proud to bring back Simi Valley's premiere trail race, formerly known as the Rocky Peak Ultra. Awesome races in beautiful places ~ Run through the picturesque mountains and steep canyons of Rocky Peak, a famous film industry location for movies and television productions including Star Wars. The race course features spectacular sandstone boulders, outcroppings, oak savannahs, and perennial water sources providing a diverse habitat for birds, mammals, and reptiles. This classic race has it all from stunning mountain and ocean views and challenging climbs...a trailrunners dream!! Choose from three distances on race day: 50k, 30k and 15k.
Enjoy 240 miles of beautiful terrain as you travel through desert, canyons, slick rock, and two mountain ranges — all while surrounded by Canyonlands and Arches National Park.
We encourage friends, family, and the running community to get involved in the run by pacing.
Pacers are for runner safety and company only, not for giving aid or to gain an advantage over another runner.
Pacing starts at the Indian Creek Aid Station. Pacers are only allowed to be picked up or dropped off at crew access aid stations.
HOKA Kodiak Ultra Marathons by UTMB offers runners the hospitality of a rustic, mountain town that sits just a couple hours from Los Angeles, California. With 2 days of racing and 5 distances, each course presents a unique running experience. Runners will enjoy views of Big Bear Lake throughout their journey – whether you’re climbing to the top of Sugarloaf Mountain or descending into Siberia Canyon, the courses will ‘wow’ you at every turn.
100 Mile, 100K, 50K, 25K and 10(+) Mile Race
Join us for the Pumpkin Holler Hunnered race on October 18th & 19th. You will agree we have found a little slice of heaven in Cherokee County, nestled along the beautiful Illinois River.
Pacers will be allowed for all 100 mile and 100K runners AFTER the first 50K loop is completed.
Each runner may have as many pacers as they like, however only one pacer at a time can accompany the runner.
Javelina Jundred is the original costumed 100 mile trail run party. Join the party Jalloween weekend! The race is held on a ~20 mile rolling single track trail course comprised mostly of the Pemberton Trail in beautiful McDowell Mountain Regional Park near Fountain Hills, Arizona. Join us for the ultimate social 100 mile trail run!
Multiple pacers may be used, but only one at a time. Pacers must be human and on foot (no pets and no bicycles allowed). Pacers can only be picked up and dropped off at Javelina Jeadquarters, therefore, all pacers should be prepared to complete the full 20-mile loop; no exceptions. No muling or carrying of a participant’s gear or supplies.
A tour of the Phoenix Mountains Preserve, this challenging 50k course will take you up iconic Piestewa Peak and Shaw Butte and along Sonoran Desert single track in the heart of Phoenix, AZ. Be prepared for 6,000' of elevation gain and some serious PHOMO for all who miss out.
There will be water fountain and restrooms at these major trailheads: 40th St Trailhead, Dreamy Draw Trailhead, North Mountain Visitor Center and Piestewa Peak Dr.
You are allowed crew access at the trailhead listed above and PACERS are allowed starting from the first time through Dreamy Draw.