Event details subject to change. Please confirm all information via event website.
USAFA Half Marathon
Rio Grande 100
The Rio Grande 100 starts and finishes on the banks of the mighty Rio Grande River in beautiful South Fork, Colorado. The race takes you though the amazing La Garita mountains, from arid forest to alpine tundra peaking out over 12,000 foot above sea level 4 times. You will enjoy golden aspen leaf covered trails […]
Smoky Hill Community 5K
3rd annual Smoky Hill Community 5k walk/run fundraiser
Walk Like MADD
Walk Like MADD is MADD's signature fundraising event to help us raise both awareness and funds to end drunk driving and fight drugged driving. With every step taken and each dollar raised, walkers are supporting MADD’s lifesaving mission to keep our families and communities safe.
Q Man Classic 5K
Highlands Ranch High School (HRHS) is proud to once again host the annual Q-Man Classic. This is a memorial race for Quinton Sanford, a student-athlete with Autism at HRHS who sadly passed away his sophomore year. Proceeds from the race will benefit Teaching the Autism Community Trades (T.A.C.T.). T.A.C.T envisions a world where neuro-diversity is […]
Resolute Brewing 5K
Resolute Brewing Tap & Cellar 18148 West 92nd Lane, #Suite 100, Arvada, CO, United StatesJoin us for The Resolute Tap & Cellar 5k on August 23, 2025, for a 5k-ish, fun run event that starts and ends at this awesome taproom in Arvada. Run, walk, jog - whatever goes! Complete the course and celebrate with us and a FREE, local craft brew at the finish line. Start windows will […]
Walk for Life 5K
This will be our annual Walk for Life 5K. Our course will begin at the Raynolds/Ash Street bridge in the parking lot across from the Rec District building. The race will run West this year from that point, towards the surgery center & we will have it clearly marked out for walkers vs runners (5K). […]
Unicorn 5K
Ready to get off the sofa and gallop around Aurora with some friends? Yeah, you are! Come frolic with us at the Unicorn Runner 5k at Arapahoe County Fairgrounds! You'll earn a sweet tee shirt! It's a 5k distance for all, and whether you walk, trot, canter or gallop, we'll be happy to see you! […]
Calarat Challenge Trail Running Festival
Join us Labor Day weekend for the Calarat Challenge Trail Running Festival. We start the festivities off on Saturday night with a 5K that you can run, walk or hike, and our Kids 1K. Then on Sunday morning, we have the 1/2 MARATHON and 10K. All trail races start and finish at the Cal-Wood Education […]
Tava Waters 5K
Orangetheory 5K
Join us for the annual Orangetheory 5k at Labor Day Lift Off. Starting from the IAFF Fallen Firefighters Memorial (northwest corner of Memorial Park), head through the side streets of Memorial Park, around Prospect Lake and finish back at the memorial. The 5K race will start at 9 a.m., but come early and watch around […]
Denver Rocks Run 5K/10K
We all know Denver is known for its world-class cultural attractions, thriving craft breweries, and red-hot music scene. Be part of the first 5K/10K running event of its kind with this rock n' roll infused run that kicks off at Civic Center Park in downtown Denver on November 6, 2021.
New Vision 5K
The New Vision 5K Run/Walk exists to support New Vision Charter School, a public school in the Thompson School District. It's main purpose is to provide our staff and students with wellness opportunities throughout the school year. The Wellness program educate our students on how to make healthy choices throughout their lives, through good nutrition […]
For a City 5K
Hey Runners! Did you know that Douglas County has one of the highest percentages of teen suicide in the United States? Thrive Church is committed to awareness of this crisis and being on the solution side of the problem. We've partnered with the Children's Hospital to take intentional steps to make a difference, and we […]
Jungle Dash
Come join us for a 1-mile fun run, as we kick off the Wild Wonderful Saturday events. Plan to stay and check out the Wild Zone. Welcome adventurers, explorers, and vine-swinging daredevils! You are invited to join us for a ROARING good time! This is going to be the WILDEST Jungle Dash of the year! […]
Canceled Sloan’s Lake Search Party Marathon
THE SUMMARY Did you know that the loop around Sloan's Lake in Denver Colorado is almost perfectly 2.62 miles around? Join us as we go around the lake every hour on the hour for 10 hours to complete a full Marathon or every other hour for 10 hours to complete a Half Marathon (if you decide to […]
D49 4.9K
Join us for the D4.9k Run/Walk, a family-friendly event open to D49 staff, students, parents, and community members! Our mission is to offer an engaging, affordable, and healthy event for everyone in our community. The event kicks off at 8:30am, with the D4.9K Run/Walk starting at 9am. Bring your little ones for the free 49-yard […]
Move Forward 5K/10K
The Move Forward 5K/10K is an event created by the Doctor of Physical Therapy students at Regis University as a community outreach project. The proceeds from the event will benefit Canine Companions for Independence and the Foundation for Physical Therapy.
Rock Cut Estes Park 5K
Join us for The Rock Cut Estes Park 5k on September 20, 2025, for a 5k-ish, fun run event that starts and ends at this awesome taproom in Estes Park. Run, walk, jog - whatever goes! Complete the course and celebrate with us and a FREE, local craft brew at the finish line. Start windows […]
Canceled Rising Phoenix 5K
The Rising Phoenix Festival & 5K Run/Walk for Suicide Prevention is Combat Recovery Foundation's first community awareness event. Runners, walkers, dogs and participants of all ages, volunteers, and spectators will gather together in celebration of life. The 5K provides an important sense of community for suicide loss and trauma survivors and creates a space for […]
AAP Friends of Children Fund 5K
Start your day with fresh air, movement, and unbeatable views at the AAP Friends of Children Fund 5K Fun Run & Walk! Set against the stunning backdrop of Sloan’s Lake Park, participants will enjoy a scenic route featuring sparkling lake views, majestic mountain peaks, and the city skyline in one picturesque loop. Whether you’re running […]
Not So Flatt Breast Cancer Awareness Run
Join us for the Not So Flatt Breast Cancer Awareness Walk and Run. In 2021, my father lost his fight against breast cancer so we have put together an annual race in his name to support everyone who has fought and is still fighting breast cancer. His last name was Flatt and his battle wasn't […]
Paws In The Park 5K
Celebrate a summer of fund-racing with us at Paws In The Park 5k Race and Pet Walk! Enjoy live music, breakfast, and mimosas. See you there!
Gold Hill Classic
Nestled in the canyons of Boulder County, Colorado the Gold Hill Classic 30k launches runners into a thrilling mix of grit, grind, and gorgeous mountain views. Wind your way through soul-shaking climbs, fast-flowing descents, and high-altitude rollers. With every turn, the course serves up sweeping vistas, winding dirt roads, and that pure, untamed energy only found […]
Boulder XC Series I
EVENTS 9:00AM 10 YEARS & UNDER - 1K 9:15AM 16 YEARS & UNDER - 3K (1 x 1K + 1 x 2K) 9:40AM OPEN - 5K (1 x 1K + 2 x 2K)
Saint’s Corp Pilgrimage Fun Run
Join us in Pagosa Springs as we come together to support programs that build confidence, leadership, and real-world skills in our younger generation through hands-on, meaningful experiences. At Saint’s Corp, we believe every child deserves the chance to grow, explore their potential, and feel supported along the way. This event helps make that vision a […]
Rise 5K
Get ready to lace up and show your Roadrunner pride at the Annual Roadrunners 5k—our favorite Homecoming tradition! Whether you’re a speedster, a stroller, or somewhere in between, everyone’s welcome to join this fun run, jog, or walk weaving through the beautiful Auraria Campus.
Riverside Ramble
The Alliance and 7000ft Running Company present The Riverside Ramble! The Riverside Ramble is an accessible fun run that celebrates survivors in the outdoor community and emphasizes the necessity for safety in all spaces. Sexual violence is prevalent in outdoor recreation and the outdoor industry. According to a 2018 survey by Outside Magazine, 70% of […]
Canceled bRUNch Run 5K/10K
The bRUNch Run ™ is back! Join us in Denver for the most epic and delicious 5K + 10K run/walk. (There is also the 15K)! Think road race meets food festival... join us for a morning of cheering runners on, finish line high fives and hugs, tears of joy, the only race with a scented […]
Boulder Skyline Traverse
The Boulder Skyline Traverse is a ~18 mile trail route that covers the 5 peaks of Boulder (South Boulder Peak, Bear Peak, Green Mountain, Flagstaff Mountain, and Mt. Sanitas). You'll gain roughly 5,600 ft of vert! The route is intermediate to advanced! All levels are welcome, but our shuttle service will be cut off at […]
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