Colorado Race Calendar — All Events
(As of Thursday, April 24, 2025) Print Version
For event listing corrections, please contact us.
For event listing corrections, please contact us.| Date | Event | Location |
| Sun., 4/27/25 7:00 AM | NoCo Half Marathon & 10K Half Marathon Run, 10K Run | Boyd Lake State Park Loveland, CO |
| Sun., 4/27/25 9:00 AM | Unicorn 5k (Denver – East) 5K Run  Register | Great Lawn Park Denver, CO |
| Sat., 5/3/25 | Bob Turner Classic 5k Run/Walk Run  Register | Turner Middle School Berthoud, CO |
| Sat., 5/3/25 8:30 AM | Greenland Trail Races 4 Mile Ultra/Trail, 25K Ultra/Trail, 50K Ultra/Trail, 8 Mile Ultra/Trail Register | Greenland Open Space Larkspur, CO |
| Sun., 5/4/25 7:30 AM | Longmont Half Marathon & 5k Half Marathon Run, 5K Run Register | Rec Center Longmont, CO |
| Sat., 5/10/25 4:00 PM | Colterris Wine Run 5k 5K Run Register | Colterris Winery Palisade, CO |
| Sat., 5/10/25 | Quad Rock 50/25mi Run Register | Lory State Park Bellvue, CO |
| Sat., 5/10/25 5:30 AM | Quad Rock 50/25mi 50 Mile Run, 25 Mile Run Register | Lory State Park Fort Collins, CO |
| 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 |
| 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 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., 7/19/25 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 |
| 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 | The Island at Pelican Lakes Windsor, CO |
| Sat., 10/11/25 7:30 AM | Long View Marathon & Half Marathon Marathon Run, Half Marathon Run Register | Edora Park Fort Collins, CO |
| Sun., 10/12/25 8:00 AM | Westy Half and 5k Half Marathon Run, 5K Run Register | Promenade Terrace Park Westminster, CO |
| Sat., 10/18/25 7:00 AM | Blue Sky Marathon & Half Marathon (26.7 Mile) Run, Half Marathon (13.3 Mile) Run Register | Blue Sky Trailhead Fort Collins, CO |
| Sat., 10/18/25 9:00 AM | The Great Trailhead Footrace 10 Mile Run, 5 Mile Run Register | Bear Creek Lake Park - Pelican Picnic Shelters Lakewood, CO |
| Sun., 10/26/25 8:30 AM | Narrowleaf Lake Run 15K Run, 10K Run, 5K Run | Boyd Lake State Park Loveland, CO |
| Sat., 11/1/25 9:00 AM | City Park 5k & 1 Mile Walk of Hope for Pancreatic Cancer Research 5K Run, 1 Mile Run Register | City Park Denver, CO |
| Sat., 11/1/25 8:00 AM | Colorado 24 Hour Run 24 Hour Run, 12 Hour Run, 6 Hour Run, Relay (24, 12, 6 hour) Run Register | Colorado Youth Outdoors Fort Collins, CO |
| Sat., 11/22/25 8:30 AM | 10k Turkey Trek & 5k Turkey Trot and Half Marathon Half Turkey Run, 10K Run, 5K Run Register | Long Lake Regional Park Arvada, CO |
| Thu., 11/27/25 9:00 AM | Pelican Lakes Turkey Trot 5K Run, 5K Walk Register | Pelican Lakes Resort & Golf Windsor, CO |
| Sat., 12/13/25 8:00 AM | Santa Catch 5k and 10k 5K Run, 10K Run, Kid's Fun Run Register | NOCO Sports Center Windsor, CO |
| Sat., 12/20/25 10:00 AM | Santa's Dash for Ca$h 5K Run Register | Sloan Lake Park Denver, CO |
| Wed., 12/31/25 6:00 PM | Resolution Run 5K 5K Run Register | Edora Pool Ice Center (EPIC) Fort Collins, CO |
| Thu., 1/1/26 10:00 AM | Resolute Runner 5k 5K Run Register | Johnny Roberts Memorial Park Arvada, CO |
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