Colorado Race Calendar — All Events
(As of Sunday, May 11, 2025) Print Version
For event listing corrections, please contact us.
For event listing corrections, please contact us.| Date | Event | Location |
| Sun., 5/11/25 8:00 AM | Colorado Women's Classic 10 Mile Run, 5K Run, 10K Run  Register | Westminster Promenade Terrace Westminster, CO |
| Fri., 5/23/25 12:00 PM | Weld Your Mettle Running Festival 7K Run, 3, 6, 9, 12, 24, 48 Hour Loop Race Run Register | Woodland Home Marketplace Eaton, CO |
| Sat., 5/31/25 | Basalt Half Marathon & Relay Run  Register | Basalt Middle School Basalt, CO |
| Sat., 5/31/25 | Rifle Western 5K Run Register | Centennial Park Rifle, CO |
| Sun., 6/1/25 6:30 AM | Colorado 13er (Half Marathon, 10k & 5k) Half Marathon Run, 10K Run, 5K Run Register | Louisville Recreation Center Louisville, CO |
| Sun., 6/1/25 7:00 AM | Crazy Legs 10k+ Trail Run 10K Ultra/Trail | Devil's Backbone Open Space Loveland, CO |
| Thu., 6/5/25 5:00 AM | Vail Ultra Benefiting 50 For The Fallen 50 Mile Ultra/Trail | The Hangout at Golden Peak Vail, CO |
| Sun., 6/15/25 7:30 AM | Father's Day Classic 10k, 5k & 1 Mile 10K Run, 5K Run, 1 Mile Run Register | Apex Recreation Center Arvada, CO |
| Sat., 6/21/25 | Elk Meadow 10k Trail Race Run Register | Buchanan Park Recreation Center Evergreen, CO |
| Sat., 6/21/25 | Elk Meadow 5k Trail Race Run Register | Buchanan Park Recreation Center Evergreen, CO |
| Sat., 6/21/25 7:00 AM | Red, White, and Brew - 5k, 10k, 1/2 Marathon, 12 Hour "Last Person Standing" 5K Run, 10K Run, Half Marathon Run, 12 Hour Last Person Standing Run Register | Hoedown Hill Windsor, CO |
| Sat., 6/21/25 8:00 AM | Unicorn 5k (North) 5K Run Register | Carpenter Park Thornton, CO |
| Sun., 6/22/25 | Buffs4Life 5k Walk/Run Run Register | Franklin Field CU Boulder Campus Boulder, CO |
| Sat., 6/28/25 8:00 AM | Before The Fourth 5k 5K Fun Run/Walk Register | Clement Park Littleton, CO |
| Sat., 6/28/25 7:00 AM | Timberview Trail Run 10 Mile Run, 5 Mle Run, 5K Run | Lory State Park Bellvue, CO |
| Fri., 7/4/25 8:00 AM | Let Freedom Run 5k – Longmont 5K Run Register | Sandstone Ranch Park Longmont, CO |
| Fri., 7/4/25 7:30 AM | Let Freedom Run 5k/10k – Louisville 10K Run, 5K Run Register | Louisville Recreation Center Louisville, CO |
| Sat., 7/5/25 | Granby Gut Buster 5k Color Run Run Register | Destination Granby Offices Granby, CO |
| Sat., 7/19/25 6:30 AM | Summer Splash Prairie Dog Half, 10k, & 5k Half Marathon Run, 10K Run, 5K Run Register | Castle View High School Castle Rock, CO |
| Fri., 7/25/25 5:30 AM | Never Summer 100k/60k 100K Run, 60K Run Register | State Forest State Park Gould, CO |
| Fri., 8/1/25 5:00 AM | Wild West Relay 200 Mile Point to Point Run Register | Fort Collins, CO |
| Sat., 8/2/25 8:00 AM | Unicorn 5k (South) 5K Run Register | Highlands Heritage Regional Park Highlands Ranch, CO |
| Sun., 8/3/25 6:30 AM | I'm Bound for Boston Marathon & Half Marathon – Denver Marathon Run, Half Marathon Run Register | Northfield High School Denver, CO |
| Tue., 8/5/25 6:00 PM | Lory Summer Trail Series – Eltuck Valley 5k 5K Run Register | Lory State Park Bellvue, CO |
| Sat., 8/9/25 8:00 AM | Holy Cow Trail Stampede 5K Run Register | Westminster Prominade Terrace Westminster, CO |
| Tue., 8/12/25 6:00 PM | Lory Summer Trail Series – Into the Hills Eltuck 10k 10K Run Register | Lory State Park Bellvue, CO |
| Sun., 8/17/25 7:00 AM | Erie Half and 5K Half Marathon Run, 5K Run Register | Reliance Park Erie, CO |
| Tue., 8/19/25 6:00 PM | Lory Summer Trail Series – Into the Hills Eltuck 5k 5K Run Register | Lory State Park Bellvue, CO |
| Fri., 8/22/25 12:00 PM | NoCo Urban Ultra and Relay 50 Mile Run (Start in Bellvue), 50 Mile Relay Run (Start in Bellvue), 100 Mile Run, 100 Mile Relay Run Register | Greeley Stampede Greeley, CO |
| Sat., 8/23/25 7:00 AM | Staunton Rocks! Marathon & Half Marathon Run, Half Marathon Run Register | Staunton State Park Pine, CO |
| Sun., 8/24/25 9:15 AM | Unicorn Festival 5k 5K Run Register | Arapahoe Fairgrounds Aurora, CO |
| Tue., 8/26/25 6:00 PM | Lory Summer Trail Series – Eltuck Valley 12K 12K Run Register | Lory State Park Bellvue, CO |
| Sat., 8/30/25 9:00 AM | Run Like The Wind 5k / 2k / Dog Jog 5K Run, 2K Run | Allenspark, CO |
| Sun., 8/31/25 10:00 AM | Wine Run 5k at The Winery at Holy Cross Abbey 5K Run Register | The Winery At Holy Cross Abbey Canon City, CO |
| Fri., 9/5/25 5:00 AM | Flaming Foliage Relay – Idaho Springs to Buena Vista 165 Mile Relay Run Register | River Park Pavilion Buena Vista, CO |
| Sat., 9/6/25 7:00 AM | Black Squirrel Half Marathon Half Marathon (13.5 Mile) Run Register | Lory State Park Fort Collins, CO |
| Sun., 9/7/25 8:00 AM | Denver Rocks Run 5K/10K at City Park | City Park Denver, CO |
| Sat., 9/13/25 9:00 AM | The Denver 5k 5K Run Register | Sloan's Lake Denver, CO |
| Sat., 9/13/25 5:30 AM | Valkyrie Relay - Durango 100 Mile Specialty, 69 Mile Specialty | Santa Rita Park Durango, CO |
| Fri., 9/26/25 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., 9/27/25 5:30 AM | The Elevation Everest Race Run | Winter Park Resort Winter Park, CO |
| Sun., 9/28/25 7:00 AM | Boulderthon, presented by PUMA | Pearl Street Mall Boulder, CO |
| Sun., 9/28/25 8:00 AM | Last Call Triathlon Sprint (and SUP option) Triathlon, SuperSprint Triathlon, Sprint Duathlon, Aquabike, Aquathlon | Boyd Lake State Park Loveland, CO |
| Sat., 10/4/25 7:00 AM | Colorado Springs Marathon Marathon Run, Half Marathon Run, 5K Run, Less than 1K Fun Run/Walk  Event Details  Register  Website  Results | Colorado Springs Pioneers Museum Colorado Springs, CO  Course Map |
| Sun., 10/5/25 7:00 AM | Hot Chocolate Run - Denver | Washington Park Denver, CO |
| Sun., 10/5/25 7:00 AM | Windsor Marathon, Half Marathon, 10K & 5K Half Marathon Run, 10K Run, 5K Run Register |