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Guide to Races in Colorado

Featured Events

Winter Running Series
Winter 2024-2025

Ralston Creek Half Marathon & 5K


Feb. 16, 2025

Chilly Cheeks Winter Duathlon
Feb. 22, 2025

Three Creeks Half Marathon
April 13, 2025

Superior Stocking Run
Dec. 14, 2024

Yeti Chase 5K/10K
Jan. 26, 2025

Winter Running Series
Winter 2024-2025

Ralston Creek Half Marathon & 5K


Feb. 16, 2025

Chilly Cheeks Winter Duathlon
Feb. 22, 2025

Three Creeks Half Marathon
April 13, 2025

Superior Stocking Run
Dec. 14, 2024

Yeti Chase 5K/10K
Jan. 26, 2025

September 2024

  • 1 Broncos Fit 7k, Broncos Stadium, Denver, Colorado, 9:00 a.m., 720.258.3100
  • 2 Oak Creek No Fun run, 5k, Town Hall, Oak Creek, Colorado, 10:00 a.m., 970.260.6257
  • 2 Labor Day Half Marathon, 5k/10k/Half Marathon, Salisbury Park, Parker, Colorado, 7:00 a.m., 720.985.9047
  • 4 Lakewood Trail Series #1, 4M, Bear Creek Lake Park, Pelican Point, Lakewood, Colorado, 6:00 p.m., 303.987.4807
  • 6 Flaming Foliage Relay, 165M, Citizens Park, Idaho Springs, Colorado, 5:00 a.m., 970.213.7258
  • 6 American Heroes Run, 9hr 11min/ 24hr ultra/5k/9.11M/Half Marathon/Marathon, Rogers Grove Park, Longmont, Colorado, 7:00 a.m., 720.275.2197
  • 7 Black Squirrel Half Marathon, Lory State Park, Fort Collins, Colorado, 7:00 a.m., 303.946.9320
  • 7 Cirque Trail Series, 6.8M/2340 vertical, Arapahoe Basin Mountain Goat Plaza, Keystone, Colorado, 10:00 a.m., 800.516.0041
  • 7 Albert Peak Challenge, 4M/12M, Wolf Creek Ski Area, Pagosa Springs, Colorado, 8:00 a.m., wolfsongadventures@gmail.com
  • 7 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 8:00 a.m., soutbouldercreek@parkrun.com
  • 8 RMRR Platte River Run, 5k/10k, Riverwalk Ballfields, Thornton, Colorado, 8:00 a.m., 303.871.8366
  • 8 Denver Rocks, 5k/10k, City Park, Denver, Colorado, 8:00 a.m., 800.233.6837
  • 8 RMRR Fall Training Series #2, 20k/30k, Riverwalk Ballfields, Thornton, Colorado, 7:00 a.m., 303.871.8366
  • 11 Lakewood Trail Series #2, 5M, Bear Creek Lake Park Pelican Point, Lakewood, Colorado, 6:00 p.m., 303.987.7830
  • 13 Run Rabbit Run, 100M, Ski Area, Steamboat Springs, Colorado, 8:00 a.m., 970.879.0880
  • 14 HRCA Oktoberfest 5k/100Y Dash, Town Center, Highlands Ranch, Colorado, 8:30 a.m., 303.471.7048
  • 14 Bergen Peak Half Marathon, Buchanan Park Recreation Center/Pioneer Trailhead, Evergreen, Colorado, 8:00 a.m., 720.880.1226
  • 14 Blisters & Brews Run, 5k, Elks Park, Telluride, Colorado, 8:30 a.m., 970.728.8037
  • 14 Breckenridge Oktoberfest Trail Run, 5k, South Gondola Parking Lot, Breckenridge, Colorado, 10:00 a.m., 970.453.1734
  • 14 CMRA The South Seven, 7M, Bluffs Regional Park, Lone Tree, Colorado, 7:30 a.m., 303.912.6401
  • 14 CO Brewery Running Series, 5k, Waldschanke Ciders Brewing Company, Denver, Colorado, 10:00 a.m., 303.955.7410
  • 14 Ned Ned Run, 5k/Half Marathon, Teens Inc, Nederland, Colorado, 8:00 a.m., 303.258.3821
  • 14 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 8:00 a.m., southbouldercreek@parkrun.com
  • 15 Farmers 5000, 5k, Wheat Ridge High School, Wheat Ridge, Colorado, 9:00 a.m., 303.880.1732
  • 15 Be Ovary Aware 5k Run, Memorial Park, Colorado Springs, Colorado, 7:00 a.m., 719.233.4114
  • 15 CO Brewery Running Series, 5k, Wibby Brewing, Longmont, Colorado, 10:00 a.m., 303.955.7410
  • 15 Flyin Lion, 5k, High School, Littleton, Colorado, 9:00 a.m., sydney@rightstartevents.com
  • 15 Lead King Loop & Quarry Climb, 25k, Thompson Park, Marble, Colorado, 8:30 a.m., 970.704.1275
  • 15 Nun Run Races, 1M/5k/Half Marathon, DeKoevend Park, Centennial, Colorado, 7:00 a.m., 720.722.3485
  • 15 Pony Express Run, 15M, Rampart Range Rd & Rainbow Gulch Trail, Woodland Park, Colorado, 8:00 a.m., 719.598.2953
  • 15 RRCC Front Nine, 5k, Red Rock Country Club, Morrison, Colorado, 8:00 a.m., 303.697.4438
  • 18 Lakewood Trail Series #3, 7M, Bear Creek Lake Park Pelican Point, Lakewood, Colorado, 6:00 p.m., 303.987.4800
  • 21 The Beulah Challenge, 5k/10k/Half Marathon, Beulah School of Natural Science, Beulah, Colorado, 8:00 a.m., 719.432.6579
  • 21 Pikes Peak Ascent, Half Marathon, Middle/High Schools, Manitou Springs, Colorado, 7:00 a.m., 719.473.2625
  • 21 Run 4 Hope, 5k, The Ascent Church, Monument, Colorado, 8:05 a.m., 719.930.6140
  • 21 Snow Mountain Ranch Races, 5k/10k/Half Marathon, YMCA of the Rockies Nordic Center, Granby, Colorado, 8:00 a.m., 858.775.7104
  • 21 Autumn Color Run, 1M/5k/10k/Half Marathon, McPhelemy Park, Buena Vista, Colorado, 9:00 a.m., 719.221.2867
  • 21 Estes Trail Ascent, 4M/6.75M, Ravencrest Chalet & Conference Center, Estes Park, Colorado, 8:00 a.m., 970.214.4128
  • 21 John Wayne Grit Series, 5k/Half, Last Dollar Ranch, Ridgway, Colorado, 8:30 a.m., 949.631.8400
  • 21 Miles 4 Madison, 1k/5k, Sterling Ranch, Littleton, Colorado, 9:00 a.m., kstiltner@sterlingranchcab.com
  • 21 Ouray Mountain Trail Run, 13M, Town Park, Ouray, Colorado, 10:00 a.m., 970.708.7142
  • 21 Run the Rockies Road Half Marathon, 10k/Half Marathon, Frisco Adventure Park, Frisco, Colorado, 8:00 a.m., 970.668.9133
  • 21 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 8:00 a.m., southbouldercreek@parkrun.com
  • 21 Superhero Run, 10k, Family Fun Plex, Greeley, Colorado, 8:30 a.m., 970.353.5970
  • 22 Equinox Half Marathon & 5M, Poudre Canyon, Fort Collins, Colorado, 8:00 a.m., 970.556.3279
  • 22 Pikes Peak Marathon, Middle/High Schools, Manitou Springs, Colorado, 7:00 a.m., 718.473.2625
  • 22 RMRR Fall Training Series #3, 10M/20M, Platte Trailhead Park, Thornton, Colorado, 7:00 a.m., 303.871.8366
  • 22 Second Wind Run, 5k, Clement Park, Littleton, Colorado, 8:00 a.m., 720.962.0706
  • 22 Sunlight Showdown Half Marathon, Sunlight Mountain Resort, Glenwood Springs, Colorado, 8:00 a.m., 970.945.9425
  • 22 The Golden Gallop, 5k/10k/Kids, Main Street Welcome Arch, Golden, Colorado, 8:00 a.m., 303.384.8000
  • 25 Sangre de Cristo Ultra, 200M, Greenhorn Music Meadows Ranch, Westcliffe, Colorado, 4:00 a.m., 720.624.9237
  • 25 Lakewood Trail Series #4, 4M, Bear Creek Lake Park Pelican Point, Lakewood, Colorado, 6:00 p.m., 303.987.4800
  • 27 Sangre de Cristo Ultra, 8M/27k/50M/100k/100M, Greenhorn Music Meadows Ranch, Westcliffe, Colorado, 4:00 a.m., 720.624.9237
  • 28 Monument Marathon 5k/Half Marathon/Marathon, Five Rocks Amphitheatre, Gering, Nebraska, 8:00 a.m., 308.765.0524
  • 28 Mines Homecoming Run 5k, Mines Admin Building, Golden, Colorado, 8:00 a.m.
  • 28 Pioneer Prairie Dog Races, 5k/10k/Half, Promenade Terrace, Westminster, Colorado, 8:00 a.m., 720.722.4226
  • 28 Emerald Mountain Trail run, 12k, Howelsen Hill, Steamboat Springs, Colorado, 9:00 a.m., 970.879.0880
  • 28 Louisville Races, 5k/10k/Marathon, Community Park, Louisville, Colorado, 7:00 a.m., 858.775.7104
  • 28 West Line Winder Trail Run, 50k, East Main & North Court Streets, Buena Vista, Colorado, 8:00 a.m., 720.591.6634
  • 28 Colorado Springs Marathon, 5k/Half/Marathon, Acacia Park, Colorado Springs, Colorado, 7:00 a.m., 801.455.9623
  • 28 HRCA Wildcat Mountain Trail run, 10k/10M, Rocky Heights Middle School, Highlands Ranch, Colorado, 7:00 a.m., 303.471.7048
  • 2824Hrs of Palmer Lake, Santa Fe Regional Trail, Monument, Colorado, 8:00 a.m., 859.327.2423
  • 28Deep Creek Half Marathon, Regional Airport, Telluride, Colorado, 12:00 p.m., 970.708.7736
  • 28Bear Chase Races, 10k/50k/50M/100k, Bear Creek Lake Park, Lakewood, Colorado, 6:30 a.m., 303.320.3343
  • 28Crested Butte Ultra, 55k/105k, Crested Butte Mountain Resort, Crested Butte, Colorado, 4:00 a.m., 719.429.9501
  • 28 Golden Leaf Half Marathon, Fanny Hill/Snowmass Village, Aspen, Colorado, 8:30 a.m., 970.925.2849
  • 28 Brain Run, 5k, Sloans Lake, Denver, Colorado, 10:00 a.m., 720.352.2551
  • 28 CO Brewery Running Series, 5k Cabin Creek Brewing, Georgetown, Colorado, 10:00 a.m., 303.955.7410
  • 28 Haxtun Corn Festival, 5k, Main Street, Haxtun, Colorado, 8:00 a.m., 970.774.6104
  • 28 Rut Run, 5k, Bond Park, Estes Park, Colorado, 8:30 a.m., 970.214.4128
  • 28 Sawatch Ascent, 50k, County Road 321, Nathrop, 8:00 a.m., 720.591.6634
  • 28 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 8:00 a.m., southbouldercreek@parkrun.com
  • 29 Boulder Backroads Marathon, 10k/Half, Boulder Reservoir, Boulder, Colorado, 7:15 a.m., 303.517.7046

October 2024

  • 5 Rim to Rim Royal Gorge Races, 5k/8M/Half, Royal Gorge, Canon City, Colorado, 8:30 a.m., 719.661.7600
  • 5 Hanging Flume 50k, Uravan Ballpark, Naturita, Colorado, 8:00 a.m., 970.708.7736
  • 5 Above the Clouds Ultra, 10k/50k, Woodland Middle School, Woodland Park, Colorado, 7:00 a.m., 719.590.1466
  • 5 Applefest 5k, Town Park, Cedaredge, Colorado, 7:30 a.m., 970.856.6961
  • 5 Its Fall Yall K9 Canter Run, 5k/10k/1M, Westin Hotel, Westminster, Colorado, 8:30 a.m., 720.722.4226
  • 5 Runway 5k for Angels, Rocky Mountain Metropolitan Airport (parking on Simms Rd), Broomfield, Colorado, 9:00 a.m., 888.426.2643
  • 5 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 8:00 a.m., southbouldercreek@parkrun.com
  • 6 RMRR Star K Ranch Run, 5k/12k, Star K Ranch, Aurora, Colorado, 8:30 a.m., 303.871.8366
  • 6 Windsor Marathon, 5k/10k/Half/Marathon, The Island at Pelican Lakes, Windsor, Colorado, 7:00 a.m., 970.213.7258
  • 6 Hot Chocolate Runs, 5k/10k/15k, Washington Park, Denver, Colorado, 7:00 a.m., info@venturesendurance.com
  • 6 PPRC Fall XC Series #1, 3.1M, Bear Creek Terrace, Colorado Springs, Colorado, 10:00 a.m., 719.648.9996
  • 6 Strides for Sierra, 5k, Sierra Elementary, Arvada, Colorado, 9:00 a.m., 303.982.0821
  • 12 Wiggins Cross Country & Citizens 5k, Wiggins High School, Wiggins, Colorado, 8:00 a.m., 970.596.2607
  • 12 Long View Races, Half/Marathon, City Park & Fossil Creek, Fort Collins, Colorado, 8:00 a.m., 970.215.9642
  • 12 Cheyenne Mountain Run, 5k/10k/25k, Cheyenne Mountain State Park, Colorado Springs, Colorado, 9:00 a.m., 719.322.0574
  • 12Sage Burner Trail Race, 15k/28k/50k, Hartman Rock, Gunnison, Colorado, 7:00 a.m., 719.429.9501
  • 12Indian Creek Fifties, 5M/15M/55k/50M, Indian Creek Trailhead, Sedalia, Colorado, 6:00 a.m., 720.624.9237
  • 12 Run the Rocks, 5k, Red Rocks Amphitheater, Morrison, Colorado, 9:00 a.m., 720.868.8472
  • 12 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 8:00 a.m., southbouldercreek@parkrun.com
  • 13 Hometown Series, 5k/Half, Promenade Terrace, Westminster, Colorado, 7:30 a.m., 720.722.4226
  • 13 Expo Park XC, 5k/Kids XC, Exposition Park, Aurora, Colorado, 8:20 a.m., 303.870.0487
  • 13 The bRUNch Run, 5k/10k, Ophelia, Denver, Colorado, 8:00 a.m., 303.993.8023
  • 13 Go Big or Go Gnome, 5k, Clement Park, Littleton, Colorado, 9:00 a.m., 303.360.6600
  • 19 Blue Sky Trail Marathon, Blue Sky Trailhead/Horsetooth Mountain Park, Fort Collins, Colorado, 7:00 a.m., 303.946.9320
  • 19 Great Trailhead Foot Race, 5k/10M, Bear Creek Lake Park, Morrison, Colorado, 8:00 a.m., 720.722.4226
  • 19 Bobcat Trail Races, 5k/10k/25k/50k, Palmer Park, Colorado Springs, Colorado, 7:00 a.m., 719.429.9501
  • 19 Gummball 5k, Adams County Fairgrounds, Brighton, Colorado, 9:30 a.m., 303.588.1452
  • 19 Mancos Cowboy Half Marathon, 5k/Half, Boyle Park, Durango, Colorado, 9:00 a.m., 814.558.9519
  • 19 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 8:00 a.m., southbouldercreek@parkrun.com
  • 20 PPRC Fall XC Series #2, 4M, North Monument Valley Park, Colorado Springs, Colorado, 10:00 a.m., 719.648.9996
  • 26 Eerie Erie, 5k/10k, Middle School, Erie, Colorado, 9:30 a.m., 303.926.7293
  • 26 Foundry Halloween Run, 5k, Soda Creek Elementary, Steamboat Springs, Colorado, 9:00 a.m., 970.819.0637
  • 26Halloweiner 5k, Black Burro Bikes, Buena Vista, Colorado, 10:30 a.m., 719.221.2867
  • 26 Monster Dash, 1M/5k/10k, Sloans Lake, Denver, Colorado, 10:00 a.m., 303.931.5306
  • 26 Race to Cure Sarcoma, 5k, Great Lawn Park, Denver, Colorado, 9:00 a.m., 301.253.8687
  • 26 Run Fur Fun Spooktacular 5k, SweetWater Brewing, Fort Collins, Colorado, 10:00 a.m., 970.484.8516
  • 26 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 8:00 a.m., southbouldercreek@parkrun.com
  • 26 Spooky Sprint, YMCA Camp Jackson, Rye, Colorado, 4:00 p.m., 719.543.5151
  • 26 YMCA Creepy Crawl, 5k, Santa Fe Trail at Palmer Lake, 9:30 a.m., 719.495.5107
  • 27 Narrowleaf Lake Run, 4M/7M/10M, Boyd Lake State Park, Loveland, Colorado, 9:00 a.m., 970.363.6499
  • 27Beware of the Bear Trail Run, 5k/15k, Bear Creek Lake Park, Morrison, Colorado, 10:00 a.m., 303.870.0487
  • 27 Day of the Dead 5k, Washington Park, Denver, Colorado, 9:00 a.m., 720.985.9047
  • 27 Trick or Trot, 5k, Apex Center, Arvada, Colorado, 9:00 a.m., 303.424.2739

November 2024

  • 2-3 Moab Trail Marathon, Marathon/Half-Marathon/10k, Kane Creek Trailhead, Moab, Utah, 9:00 a.m., 970.389.4838
  • 2HRCA Backcountry Wilderness Half Marathon, Paint Brush Park, Highlands Ranch, Colorado, 8:30 a.m., 303.471.7048
  • 2Bridge Burner Ultra, Half Marathon/30k/50k, Centennial Park, Canon City, Colorado, 7:30 a.m., 719.590.1466
  • 2 Bell Ringer Run, 4M, North Lake Park, Loveland, Colorado, 2:30 p.m., 970.215.9642
  • 2 City Park 5k, City Park, Denver, Colorado, 9:00 a.m., 720.722.4226
  • 2 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 3 RMRR Prairie Gateway 5k/9M, Prairie Gateway Park, Commerce City, Colorado, 9:00 a.m., 303.871.8366
  • 3 PPRC Fall XC Series #3, 5.5M, Pinon Valley Park, Colorado Springs, Colorado, 10:00 a.m., 719.648.9996
  • 3 Rim Rock Marathon, 12k/Half/Marathon, Colorado National Monument, Fruita, Colorado, 8:00 a.m., 970.248.1469
  • 9 Longmont Turkey Trot, 2M/10k, Altona Middle School, Longmont, Colorado, 9:00 a.m., 303.651.8406
  • 9Kessel Ultra Run, 10M/20M/60k/50M, North Fruita Desert, Fruita, Colorado, 6:00 a.m., 719.429.9501
  • 9 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 10 The Great Candy Run, 5k, Washington Park, Denver, Colorado, 10:00 a.m., 303.694.2202
  • 15Denver Pumpkin Pie Run, 5k/10k, City Park, Denver, Colorado, 4:00 p.m., 720.985.9047
  • 16 Reuter Hess Trail Run, 10k, Reuter Hess Reservoir, Castle Rock, Colorado, 10:00 a.m., 303.870.0487
  • 16 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 17 PPRC Fall XC Series #4, 7.4M, Palmer Park, Colorado Springs, Colorado, 10:00 a.m., 719.648.9996
  • 23 Brighton Turkey Trot, 5k, Recreation Center, Brighton, Colorado, 8:30 a.m., 303.655.2000
  • 23 Arvada Turkey Trek, 2k/5k/10k, Long Lakes Sports Complex, Arvada, Colorado, 8:30 a.m., 720.722.4226
  • 23 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 28 Boulder Thanksgiving Day Run, 1k/5k, Flatiron Park, Boulder, Colorado, 9:00 a.m., 720.532.5549
  • 28Broomfield Turkey Day 5k/10k, Broomfield Commons Open Space, Broomfield, Colorado, 9:00 a.m., 720.7226
  • 28 Buena Vista Turkey Trot, 5k/Fun Run, Railroad & Cedar Streets, Buena Vista, Colorado, 10:00 a.m., 719.395.2447
  • 28 Colorado Springs YMCA Briargate Turkey Trot, 5k, Briargate YMCA, Colorado Springs, Colorado, 9:00 a.m., 719.495.5107
  • 28Castle Rock Turkey Rock Trot, 5k, Douglas County Events Center, Castle Rock, Colorado, 7:30 a.m., 303.688.1114
  • 28 Denver Mile High Turkey Trot, 4M, Washington Park, Denver, Colorado, 10:15 a.m., 303.694.2202
  • 28 Durango Turkey Trot, 1M/5M, Fort Lewis College, Durango, Colorado, 10:00 a.m., 970.903.6774
  • 28 Frisco Turkey Day 5k, Old Community Center, Frisco, Colorado, 9:30 a.m., 970.668.9133
  • 28 Louisville Turkey Trot, 5k, Public Library, Louisville, Colorado, 9:00 a.m., 720.366.1544
  • 28Loveland Huffin for Stuffin, 5k, Mehaffey Park, Loveland, Colorado, 8:00 a.m., 970.215.9642
  • 28 Parker Turkey Day 5k, Cherry Creek Trail, Parker, Colorado, 8:00 a.m., 303.805.3278
  • 28 Pueblo Turkey Trot, 5k, YMCA Camp Jackson, Rye, Colorado, 9:00 a.m., 719.543.5151
  • 28Windsor Turkey Trot, 5k, Pelican Lakes, Windsor, Colorado, 9:00 a.m., 970.213.7258
  • 29 CO Brewery Running Series Trot & Tap 5k, Colorado Tap House, Arvada, Colorado, 10:00 a.m., 303.955.7410
  • 30Colorado Cold Rush, Half Marathon/50k, Bear Creek Regional Park, Colorado Springs, Colorado, 719.590.1466
  • 30 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com

December 2024

  • 1 Rudolph Ramble, 5k, City Park, Denver, Colorado, 10:00 a.m., 303.694.2202
  • 7Ugly Sweater Run, 1M, South Main Square, Buena Vista, Colorado, 4:00 p.m., 719.221.2867
  • 7Sawmill Trail Runs, 8M/16M/50k, Ranch Hand Picnic Area/Staunton State Park, Pine, Colorado, 7:00 a.m., 720.624.9237
  • 8 Rock Canyon Half Marathon, Pueblo City Park, Pueblo, Colorado, 9:00 a.m.
  • 14 Superior Stocking Run 5k, Purple Park, Superior, Colorado, 9:00 a.m., 303.642.7917
  • 14 Sweaty Sweater Run, 5k, Horsetooth Reservoir, Fort Collins, Colorado, 10:00 a.m., 970.556.3279
  • 14Santa Catch Run, 5k/10k, Power to Play, Windsor, Colorado, 9:00 a.m., 970.213.7258
  • 14 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 15 Christmas Sweater Run, 5k, Washington Park, Denver, Colorado, 9:00 a.m., 720.985.9047
  • 21 Santas Dash for Cash, 1M/5k, NE Sloans Lake Park, Denver, Colorado, 9:55 a.m., 720.722.4226
  • 21 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 22 Candy Cane Run, 5k, Westin Hotel, Westminster, Colorado, 10:00 a.m., 303.931.5306
  • 28 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 31 Fort Collins Resolution Run, 5k, Edora Pool, Fort Collins, Colorado, 6:00 p.m., 303.946.9320

January 2025

  • 4 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 11 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 18 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 25 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 26 Yeti Chase 5k/10k, Bear Creek Lake Park, Morrison, Colorado, 10:00 a.m., 303.642.7917

February 2025

  • 1 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 8 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 14 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 15 Heart Throb 5k, Sandstone Park, Longmont, Colorado, 10:00 a.m., 720.722.4226
  • 16 Ralston Creek Half Marathon & 5k, Fig Street, Arvada, Colorado, 9:00 a.m., 303.642.7917

    March 2025

  • 1 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 2 Pueblo Spring Runoff, 5k/10k/10M, Dutch Clark Stadium, Pueblo, Colorado, 9:00 a.m., 719.564.9303
  • 8 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 15 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 22 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 29 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com

    April 2025

  • 5 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 12 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 19 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 26 Runs with Scissors, Half Marathon/Marathon/50k, Adams County Regional Park, Brighton, Colorado, 7:00 a.m., 303.659.8792
  • 26 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 27 NOCO Half Marathon & 10K, Boyd Lake State Park, Loveland, Colorado, 7:15 a.m., 970.363.6499

    May 2025

  • 3 Adams County Foster Care 5k, 1M/5k, Riverdale Regional Park, Brighton, Colorado, 8:00 a.m., 303.637.8027
  • 3 Hope House 5k, Apex Center, Arvada, Colorado, 9:00 a.m., 303.429.1012
  • 3 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 10 Carbon Valley Half Marathon & 5k, Firestone Sports Complex, Firestone, Colorado, 8:00 a.m., 720.331.4678
  • 10 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 10 Aspen Park Run, 5k, Gold & Tennis Club, Aspen, Colorado, 9:00 a.m., 970.429.2092
  • 17 South Boulder Creek Park Run, 5k, East Boulder Community Recreation Center, Boulder, Colorado, 9:00 a.m., southbouldercreek@parkrun.com
  • 26 Bolder Boulder, 10k, 30th & Pearl, Boulder, Colorado, 7:00 a.m., 303.444.7223

    June 2025

  • 1 Steamboat Marathon, 10k/Half Marathon/Marathon, 8th & Oak, Steamboat Springs, Colorado, 7:30 a.m., 970.285.3550
  • 1 Colorado 13er, 5k/10k/Half Marathon, Home Depot, Louisville, Colorado, 6:45 a.m., 720.722.4226
  • 8 Timberview Trail Run, 2.5M/5M, Lory State Park, Bellvue, Colorado, 7:30 a.m., 970.363.6499

    July 2025

  • 26 Elevation Run, 2M/5k/10k, West Jeff Elementary School, Conifer, Colorado, 8:00 a.m., 303.982.5255
  • 26 Enchanted Forest Trail Races, Half Marathon/Marathon, Bradenburg Park, Red River, New Mexico, 6:30 a.m., 303.249.1112
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