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  • Polar Plunge 5K

    Rock Ledge Ranch Garden of the Gods Park 3202 Chambers Way, Colorado Springs, CO, United States

    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 & […]

    $40

  • Lucky Lyons 5K/10K

    Bohn Park 199 2nd Ave., Lyons, CO, United States

    Ready to start your St. Patrick’s celebrations off with the wind at your back? Grab your luckiest green running gear and join us March 9th on the beautiful paths of […]

  • Canceled Beer and Donut Hole Mile

    Colorado Tap House - Arvada 14982 West 69th Avenue, Arvada, CO, United States

    Join us for our take on the Beer Mile and/or the Donut Hole Mile to be held as part of our 4th Year Anniversary celebration on Saturday, March 7th, 2026! […]

  • Runnin’ of the Green Lucky 7K

    Featured
    Washington Park - Denver 701 S Franklin St, Denver, CO, United States

    Feeling the luck o' the Irish? Lace-up and chase the rainbow in Denver’s favorite Irish-themed run! Join us at Washington Park for some shenanigans!  Runnin' of the Green (ROTG) is […]

  • Run Through Time Marathon

    Salida Scout Hut 210 East Sackett Avenue, Salida, CO, United States

    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

    Eastman Park 7025 Eastman Park Dr, Windsor, CO, United States

    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

    Halfpenny Brewing Company 5150 E Arapahoe Rd, Centennial, CO, United States

    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 Race Series
    Highlands Ranch Town Center 9352 Dorchester St., Highlands Ranch, CO, United States

    Grab 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 […]

    $35 – $65

  • Luck of the Irish 7K

    Steamboat Springs Running Series
    Steamboat Springs Middle School 5100 Amethyst Drive, Steamboat Springs, CO, United States

    The 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 […]

  • Erin Go Braugh 7.77K

    Westminster Promenade 10600 Westminster Blvd, Westminster, CO, United States

    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

    Acacia Park 115 E Platte Ave, Colorado Springs, CO, United States

    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

    WestCo Brewing 905 Struthers Ave, Grand Junction, CO, United States

    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 […]

    $35

  • ShamROCK Stampede

    Featured
    Douglas County Event Center 500 Fairgrounds Drive, Castle Rock, CO, United States

    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 […]

    $35

  • Lucky Leprechaun 5K

    Twisted Pine Brewing Company 3201 Walnut St, Boulder, CO, United States

    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 […]

    $35

  • Krueger Family Shamrock Shuffle

    Vail Golf Club 1778 Vail Valley Drive, Vail, CO, United States

    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! […]

  • Canyonlands Half Marathon

    Scenic HWY 128 along Colorado River 36 S 100 E, Moab, UT, United States

    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

    Chatfield State Park 11500 N. Roxborough Park Rd, Littleton, CO, United States

    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

    North Area Athletic Complex 19500 West 64th Pkwy, Arvada, CO, United States

    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

    Stapleton Central Park 8801 Martin Luther King Jr Blvd, Denver, CO, United States

    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 Trailhead Moab, UT, United States

    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

    Aurora Reservoir 5800 S Powhaton Rd, Aurora, CO, United States

    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

    City Park - Denver 2001 Steele St, Denver, CO, United States

    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

    North Creek Complex 5725 Mark Dabling Blvd, Colorado Springs, CO, United States

    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

    Stanley Park 380 Community Dr, Estes Park, CO, United States

    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

    RMRR Marathon Training Series
    Platte River Trailhead Park Colorado Blvd and E 88th Ave, Thornton, CO, United States

    These 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

    Sparge Brewing 3999 GW Bush Avenue Unit 101, Wellington, CO, United States

    Both races start & finish at Sparge Brewing in Wellington 3999 GW Bush Unit 101, Wellington, CO 80549

  • Cayson Pearson Memorial 5K

    Green Mountain High School 13175 West Green Mountain Dr, Lakewood, CO, United States

    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 […]

  • Running Up for Air

    Moab Rim Trailhead Moab Rim Trailhead Rd, Moab, UT, United States

    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 […]

  • Easter Bunny Hop

    Coal Creek Park 575 Kattell St, Erie, CO, United States

    This family-friendly 5K is designed for runners, walkers, families, and anyone who loves welcoming spring in a fun and festive way. Whether you’re chasing a personal best or strolling the […]

  • Desert RATS Trail Running Festival

    Mack Trailhead on Kokopelli Trail 1022 Old US Hwy 6 & 50, Mack, CO, United States

    Desert Rats Trail Running Festival by UTMB has four unique distances, three days of racing and indescribable views of the desert. There is something for every runner. Enjoy views of […]

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