Colorado Race Calendar — All Events
(As of Monday, September 07, 2026) Print Version
For event listing corrections, please contact us.
For event listing corrections, please contact us.| Date | Event | Location |
| Sat., 9/12/26 9:00 AM | The Denver 5k 5K Run  Register | Sloan Lake Park Denver, CO |
| Sat., 9/19/26 1:00 PM | Lederhosen Run 3.6 Mile Fun Run/Walk Register | The Tavern at Red Feather Lakes Red Feather Lakes, CO |
| Fri., 9/25/26 6:00 AM | Red Feather Trail Jamboree 50 Mile Run, 50K Run, Half Marathon Run Register | Ben Delatour Scout Ranch Red Feather Lakes, CO |
| Sat., 9/26/26 7:00 PM | Night Nation Run – Denver Run Register | Dick's Sporting Goods Park Commerce City, CO |
| Sat., 9/26/26 | Oktoberfest 5k Run  Register | Breckenridge Recreation Center Breckenridge, CO |
| Sat., 9/26/26 8:00 AM | OUTLAST Colorado Springs 6 Hour Challenge (30K) Ultra/Trail Register | Norris Penrose Event Center Colorado Springs, CO |
| Sat., 9/26/26 | Race to the Shield Homecoming Run Run Register | Berthoud High School Bethoud, CO |
| Sat., 9/26/26 6:00 AM | WILD Wahatoya Runs 50K Ultra/Trail, Half Marathon Ultra/Trail, 8 Mile Ultra/Trail | La Veta, CO |
| Sun., 9/27/26 7:00 AM | Boulderthon | Pearl Street Mall Boulder, CO |
| Sun., 9/27/26 8:00 AM | Last Call Triathlon & Multisport Sprint Triathlon, Supersprint Triathlon, Sprint Duathlon | Boyd Lake State Park Loveland, CO |
| Sat., 10/3/26 7:00 AM | Colorado Springs Marathon Marathon Run, Half Marathon Run, 5K Run, Kids K Fun Run/Walk Register | Colorado Springs Pioneers Museum Colorado Springs, CO |
| Sat., 10/3/26 8:00 AM | OUTLAST Denver 6 Hour Challenge (30K) Ultra/Trail Register | Chatfield State Park Littleton, CO |
| Sat., 10/3/26 8:00 AM | The Ruff Run 2.1 Mile Obstacle Specialty | Boyd Lake State Park Loveland, CO |
| Sun., 10/4/26 7:00 AM | SKECHERS Hot Chocolate Run - Denver 5K Run | Washington Park Denver, CO |
| Sun., 10/11/26 8:00 AM | Westy Half and 5k Half Marathon Run, 5K Run Register | Promenade Terrace Park Westminster, CO |
| Sat., 10/17/26 9:00 AM | The Great Trailhead Footrace 10 Mile Run, 5 Mile Run Register | Bear Creek Lake Park, Pelican Point Picnic Shelter Lakewood, CO |
| Sat., 10/31/26 9:30 AM | I Ain't Scared of 5k 5K Run Register | Carpenter Park Thornton, CO |
| Sat., 10/31/26 8:30 AM | Narrowleaf Lake & Pumpkin Run 10 Mile Run, 7 Mile Run, 4 Mile Run, 1 Mile Run | Boyd Lake State Park Loveland, CO |
| Sat., 10/31/26 | Panda Waddle 5k Run Register | Longs Family Park Grand Junction, CO |
| Sun., 11/15/26 | Giants of the Plains Nature Walk Run Register | Commerce City Parks Commerce City, CO |
| Thu., 11/26/26 | Turkey Burn Run Register | Fort Lupton Recreation & Parks Department Fort Lupton, CO |
| Sat., 12/5/26 3:30 PM | Onesie Dash 1 Mile Fun Run/Walk Register | The Tavern at Red Feather Lakes Red Feather Lakes, CO |
| Sat., 12/12/26 9:00 AM | Superior Stocking Run 5k 5K Run | Superior, CO |
| Sat., 1/16/27 8:00 AM | Rock 'n' Roll Arizona 5K Run  Event Details  Register  Website  Results | Tempe Beach Park Tempe, AZ  Course Map |
| Sun., 1/17/27 7:00 AM | Rock 'n' Roll Arizona Half Marathon Run, 10K Run Event Details Register Website Results | Tempe Beach Park Tempe, AZ Course Map |
| Sun., 1/24/27 10:00 AM | Yeti Chase 5k/10k 5K Run, 10K Run | Bear Creek Lake Park Morrison, CO |
| Sun., 2/14/27 9:00 AM | Ralston Creek Half Marathon & 5k Half Marathon Run, 5K Run | Arvada, CO |
| Sat., 2/20/27 10:00 AM | Chilly Cheeks Winter Duathlon, Relay & 5k Run Only 2.5 mi run/10.8 mi bike/2.5 mi run Duathlon, 5K Run | Cherry Creek State Park - Hobie Hill Lot Denver, CO |
| Sun., 4/4/27 8:00 AM | Three Creeks Half Marathon & 5k Run Half Marathon Run, 5K Run | Cherry Creek State Park - Hobie Hill Lot Denver, CO |
| Sat., 5/8/27 9:30 AM | Colterris Wine Run 5k 5K Run Register | Colterris Winery Palisade, CO |
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