Event details subject to change. Please confirm all information via event website.
Run Through Time Marathon
The Annual Run Through Time Marathon, Half Marathon, and 2 Mile Run will take place on Saturday, March 11, in Salida, CO. These beautiful, challenging courses are run on dirt/jeep […]
Lucky Brew Race
Start your St. Patrick's celebration with either a 5k, 10k or 15k on the Kyger and Poudre River Trail. All participants will receive chip timing, free finish line video footage […]
CMRA Spring Spree 10K
The Spring Spree Race is an out-and-back 10K running and 5K race walking course that starts and finishes north of the Halfpenny Brewing Co. across E. Arapahoe Rd. The race […]
HRCA St. Patick’s Day 5K
Highlands Ranch Town Center 9352 Dorchester St., Highlands Ranch, CO, United StatesGrab your friends, family, running/walking shoes, and your best Irish costume, and join us as we celebrate St. Patrick's Day with a festive 5K! The run/walk will start and finish […]
Luck of the Irish 7K
Steamboat Springs Middle School 5100 Amethyst Drive, Steamboat Springs, CO, United StatesThe Luck of the Irish 7k run/walk is a great way to start off the day with a bang! This race provides scenic views of Buffalo Pass and Strawberry Park […]
Sharin O’ The Green 5K
Washington Park - Fort Collins 301 Maple St, Fort Collins, CO, United StatesThis 5k has the luck of the Irish! Bring the kids and the pup for a fun event filled with craft beer, miles of smiles, and memories to last a lifetime at Odell Brewing Company in Fort Collins on March 11, 2023.
Erin Go Braugh 7.77K
Join us for the annual Erin Go Bragh 7.77k! This is THE LUCKIEST race on earth! There may not be a real pot of gold at the finish line of […]
5K for St. Patrick’s Day
Join us for the 40th annual 5k for St. Patrick’s Day! Back again in the downtown area, it’s the flattest 5k in Colorado Springs! Wear your kilts and your super green […]
Saint Patty’s Day 5K
Wear your greenest green and get ready for a Saint Patrick’s Day themed social event benefiting local non-profit The Gift of Love. Bring the family and your 4 legged best buddies, Kids 12 […]
ShamROCK Stampede
ShamROCK Stampede’s mission is to elevate the celebration of St. Paddy’s Day with a family-friendly Walk/Run and Irish-themed festival to increase awareness and raise funds for organizations that help our […]
Pi Day 5K
Wibby Brewing 209 Emery Street, Longmont, CO, United StatesJoin us for the Pi Day 5k at Wibby Brewing on March 14, 2026. The event starts and ends at this awesome Longmont taproom. Run/walk our 3.1415926535* mile run, and […]
Lucky Leprechaun 5K
Join us for our Lucky Leprechaun 5K Fun Run taking place on St Patrick’s Day at Twisted Pine Brewing Company - 3201 Walnut St Suite A, Boulder, CO 80301. The […]
Krueger Family Shamrock Shuffle
The annual Vail Recreation District Krueger Family Shamrock Shuffle short and long races and the kids' fun run will celebrate all things green in the spirit of St. Patrick’s Day! […]
COPS 90 Minute Race
Colorado State Patrol Track 2054 Quaker Street, Golden, CO, United StatesThe Colorado Outdoor Pace Series ("C.O.P.S.") is a unique set of races presented by Golden Mountain Runners and Golden Endurance. Race Dates January 7, 2026 - 5K January 21, 2026 […]
Canyonlands Half Marathon
The first Canyonlands Half Marathon was run on May 1, 1976 had just 22 finishers, including a dog. Today, thousands of runners come together in March to enjoy the scenic […]
Kingfisher Half Marathon
We host one race per month from November to March. All races are at Chatfield State Park and start at 9:00 am on Saturday mornings. Check-in starts at 8:15 am.
All-Out Spring Fever
From the base of Table Mountain and Colorado's spectacular foothills, All-Out Multicourse presents our 11th annual Spring Fever from Jefferson County's NAAC Stadium… easily accessible from several nearby highways. Along […]
Central Park 5K
Is it spring or still winter? We'll know when we run the Central Park 5k at the end of March! Celebrate the end of winter with us on this flat […]
Behind the Rocks Ultra
Behind the Rocks Ultra starts and finishes at the Behind the Rocks Trail, along the border of the Behind the Rocks Wilderness Study Area. Moab's last hidden gem; its tall […]
Polar Plunge 5K
Are you ready for the COOLEST event of the season! Whether you're a daring plunger, a speedy 5K runner/walker, or a thrill-seeker ready to do BOTH, the Polar Plunge & […]
City Park Circuit
Denver Athletics brings you the Denver Park Circuit Series- Three races at Denver's iconic city parks with the same format: One Lap As Fast As You Can Go! Spring- The […]
All Hands on Deck Pirates 5K
This fun packed 5k is Presented by Give It Forward. Bring your entire family. It's All about community. Every child deserves a great start to the school year—but not every […]
Cryogenic Cannibal Chase
Planning on some degenerate behavior at Frozen Dead Guy Days? Start your morning off right with an 8k ripper around Lake Estes. This race is the morning pre game for […]
RMRR Spring Marathon Training Series #1
Platte River Trailhead Park Colorado Blvd and E 88th Ave, Thornton, CO, United StatesThese Marathon training races are geared towards people training for spring marathons. They are supported runs with aid stations and are timed and scored. There are both 10 mile and […]
Equinox Half Marathon
Both races start & finish at Sparge Brewing in Wellington 3999 GW Bush Unit 101, Wellington, CO 80549
Tortoise & Hare 12K
Cottonwood Glen Park 3074 S Overland Trail, Fort Collins, CO, United StatesThe Tortoise & Hare (T&H) is a low-key “handicap” series of seven races that are run monthly from October to April, typically on the first or second Sunday of the […]
Splash & Dash II
Louisville Recreation and Senior Center 900 Via Appia Way, Louisville, CO, United StatesJoin us for a Kids’ Splash & Dash Series this winter at the Louisville Rec Center! Get ready for a fun, energetic winter racing experience! Each event features an indoor […]
Cayson Pearson Memorial 5K
This annual fun run/walk (& knockout tournament if you also love basketball) is held each year to honor the memory of Cayson Pearson, award scholarships, raise funds for additional and […]
PPRR Nielson Challenge
North Monument Valley Park 1794 Culebra Ave., Colorado Springs, CO, United StatesRace Format The first time you run this event, you'll establish a base time for yourself. This base time is used to generate a handicap time. The handicap time is […]
Running Up for Air
The Up For Air Series is a collection of endurance events created to support improved air quality, while having fun hiking and running on great trails with good people. Proceeds […]
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