Colorado

Colorado Race Calendar — All Events

(As of Thursday, April 24, 2025) Print VersionPrint  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
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Great Lawn Park
Denver, CO
Sat., 5/3/25
Bob Turner Classic 5k Run/Walk
Run
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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
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Greenland Open Space
Larkspur, CO
Sun., 5/4/25
7:30 AM
Longmont Half Marathon & 5k
Half Marathon Run, 5K Run
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Rec Center
Longmont, CO
Sat., 5/10/25
4:00 PM
Colterris Wine Run 5k
5K Run
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Colterris Winery
Palisade, CO
Sat., 5/10/25
Quad Rock 50/25mi
Run
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Lory State Park
Bellvue, CO
Sat., 5/10/25
5:30 AM
Quad Rock 50/25mi
50 Mile Run, 25 Mile Run
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Lory State Park
Fort Collins, CO
Sun., 5/11/25
8:00 AM
Colorado Women's Classic
10 Mile Run, 5K Run, 10K Run
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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
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Woodland Home Marketplace
Eaton, CO
Sat., 5/31/25
Basalt Half Marathon & Relay
Run
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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
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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
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Apex Recreation Center
Arvada, CO
Sat., 6/21/25
Elk Meadow 10k Trail Race
Run
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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
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Hoedown Hill
Windsor, CO
Sat., 6/21/25
8:00 AM
Unicorn 5k (North)
5K Run
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Carpenter Park
Thornton, CO
Sun., 6/22/25
Buffs4Life 5k Walk/Run
Run
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Franklin Field CU Boulder Campus
Boulder, CO
Sat., 6/28/25
8:00 AM
Before The Fourth 5k
5K Fun Run/Walk
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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
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Sandstone Ranch Park
Longmont, CO
Fri., 7/4/25
7:30 AM
Let Freedom Run 5k/10k – Louisville
10K Run, 5K Run
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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
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Castle View High School
Castle Rock, CO
Fri., 7/25/25
5:30 AM
Never Summer 100k/60k
100K Run, 60K Run
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State Forest State Park
Gould, CO
Fri., 8/1/25
5:00 AM
Wild West Relay
200 Mile Point to Point Run
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Fort Collins, CO
Sat., 8/2/25
8:00 AM
Unicorn 5k (South)
5K Run
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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
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Northfield High School
Denver, CO
Tue., 8/5/25
6:00 PM
Lory Summer Trail Series – Eltuck Valley 5k
5K Run
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Lory State Park
Bellvue, CO
Sat., 8/9/25
8:00 AM
Holy Cow Trail Stampede
5K Run
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Westminster Prominade Terrace
Westminster, CO
Tue., 8/12/25
6:00 PM
Lory Summer Trail Series – Into the Hills Eltuck 10k
10K Run
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Lory State Park
Bellvue, CO
Sun., 8/17/25
7:00 AM
Erie Half and 5K
Half Marathon Run, 5K Run
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Reliance Park
Erie, CO
Tue., 8/19/25
6:00 PM
Lory Summer Trail Series – Into the Hills Eltuck 5k
5K Run
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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
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Greeley Stampede
Greeley, CO
Sat., 8/23/25
7:00 AM
Staunton Rocks! Marathon & Half
Marathon Run, Half Marathon Run
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Staunton State Park
Pine, CO
Sun., 8/24/25
9:15 AM
Unicorn Festival 5k
5K Run
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Arapahoe Fairgrounds
Aurora, CO
Tue., 8/26/25
6:00 PM
Lory Summer Trail Series – Eltuck Valley 12K
12K Run
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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
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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
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River Park Pavilion
Buena Vista, CO
Sat., 9/6/25
7:00 AM
Black Squirrel Half Marathon
Half Marathon (13.5 Mile) Run
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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
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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
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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
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The Island at Pelican Lakes
Windsor, CO
Sat., 10/11/25
7:30 AM
Long View Marathon & Half Marathon
Marathon Run, Half Marathon Run
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Edora Park
Fort Collins, CO
Sun., 10/12/25
8:00 AM
Westy Half and 5k
Half Marathon Run, 5K Run
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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
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Blue Sky Trailhead
Fort Collins, CO
Sat., 10/18/25
9:00 AM
The Great Trailhead Footrace
10 Mile Run, 5 Mile Run
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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
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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
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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
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Long Lake Regional Park
Arvada, CO
Thu., 11/27/25
9:00 AM
Pelican Lakes Turkey Trot
5K Run, 5K Walk
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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
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NOCO Sports Center
Windsor, CO
Sat., 12/20/25
10:00 AM
Santa's Dash for Ca$h
5K Run
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Sloan Lake Park
Denver, CO
Wed., 12/31/25
6:00 PM
Resolution Run 5K
5K Run
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Edora Pool Ice Center (EPIC)
Fort Collins, CO
Thu., 1/1/26
10:00 AM
Resolute Runner 5k
5K Run
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Johnny Roberts Memorial Park
Arvada, CO
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