Running Races in Colorado — 2026

There are 269 running races in Colorado in 2026 across 73 cities. The next upcoming race is the DU Crimson Classic 5K Run/1.5 Mile Walk in Denver on October 21. Popular distances include 5K races, half marathons, ultras.

Time to Paddy 5K/10K & Lucky 13.1 13.1 - Denver

Sat, Mar 6 · Denver, CO Denver

Virtual 1 Mile1 Mile5K +11

From $17 Open 5 spots left

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Time to Paddy 5K/10K & Lucky 13.1 - Colorado Springs

Sun, Mar 7 · Colorado Springs, CO Colorado Springs

Virtual 1 Mile1 Mile5K +11

From $17 Open 5 spots left

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Erin Go Bragh 7.77k

Sat, Mar 13 · Westminster, CO Westminster

Road 7.77k7.77k

From $33 Open

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Lucky Brew Race 5K, 10K, 15k & Half Marathon

Sun, Mar 14 · Severance, CO Severance

Road Kids Fun RunKids Fun RunLucky Brew 5K +7

From $15 Open

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St. Paddy's Day Lucky Run 5K/10K/13.1 DENVER/AURORA

Sat, Mar 20 · Centennial, CO Centennial

Virtual Family Fun Run 1 Mile5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

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Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Sat, Mar 20 · Centennial, CO Centennial

Virtual Family 1 Mile Fun Run5K Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

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Central Park 5k

Sun, Mar 21 · Denver, CO Denver

Road 5k Run/Walk5k Run/Walk

From $20 Open

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Spring Equinox

Sun, Mar 21 · Wellington, CO Wellington

Virtual Virtual 5k5kVirtual 5k +5

From $20 Open Closing Soon

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All-Out Spring Fever

Sun, Mar 21 · Golden, CO Golden

Virtual VIRTUAL 5K5KVIRTUAL 5K +9

From $20 Open

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Always Hope Easter Run DENVER/AURORA

Sat, Mar 27 · Centennial, CO Centennial

Virtual Family Fun Run 1 Mile5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

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SuperHeroes Run DENVER/AURORA

Sat, Mar 27 · Centennial, CO Centennial

Virtual Family Fun Run 1 Mile5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

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Donut Dash

Sun, Apr 4 · Denver, CO Denver

Road 5K5KVirtual 5K +1

From $30 Open

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Run for PB&J 5k/10k/13.1 DENVER/AURORA

Sat, Apr 10 · Centennial, CO Centennial

Virtual Family 1 Mile Fun RunVirtual Run Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

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Sloth Run 5K/10K/13.1 DENVER/AURORA

Sat, Apr 10 · Centennial, CO Centennial

Virtual Family 1 Mile Fun RunVirtual Run Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

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NoCo Urban Ultra & Relay

Sun, Apr 11 · Bellvue, CO Bellvue

Ultra 50 Mile (Relay)50 Mile (Individual)50 Mile (Individual) +5

From $65 Open

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Platte River Half-Marathon, Relay & 5k

Sun, Apr 11 · Littleton, CO Littleton

Road 2027 5k5k5k +6

From $35 Open Closing Soon

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Spring Fling Prairie Dog Half, 10k, & 5k

Sun, Apr 11 · Arvada, CO Arvada

Road 5k5k10k +3

From $25 Open

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Horsetooth Half Marathon - Presented by Fort Collins Connexion

Sun, Apr 18 · Fort Collins, CO Fort Collins

Road Half MarathonHalf Marathon

From $75 Open

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Run for Donut DENVER/AURORA

Sat, Apr 24 · Centennial, CO Centennial

Virtual Family 1 Mile Fun RunVirtual Run Registration5K Registration +3

From $30 Open

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Coffee Lover Run DENVER/AURORA

Sat, Apr 24 · Centennial, CO Centennial

Virtual Family 1 Mile Fun RunVirtual Run Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

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Bigfoot Half Marathon

Sat, Apr 24 · Estes Park, CO Estes Park

Road Kids Dash5K Run/Walk5K Run/Walk +2

From $30 Open

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All-Out Beat the Heat

Sat, Apr 24 · Westminster, CO Westminster

Virtual 5KVIRTUAL 5K5K +9

From $20 Open Closing Soon

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DoNot Stop Half Marathon/5K/10K - Colorado Springs

Sat, Apr 24 · Colorado Springs, CO Colorado Springs

Virtual 1 Mile1 Mile5K +13

From $0 Open Closing Soon 5 spots left

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Unicorn 5k (Denver-East)

Sun, Apr 25 · Denver, CO Denver

Road 5k5k1/2 Mile(ish) Saunter +1

From $13 Open

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DoNot Stop Half Marathon/5K/10K - Denver

Sun, Apr 25 · Denver, CO Denver

Virtual 1 Mile1 Mile5K +11

From $17 Open Closing Soon 5 spots left

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Greenland Trail Races

Sat, May 1 · Larkspur, CO Larkspur

Ultra 4 Mile4M Trail Races8 Mile +9

From $25 Open

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Longmont Half & 5k (LM Half)

Sun, May 2 · Longmont, CO Longmont

Road 5k5kHalf Marathon +1

From $35 Open

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The Colorado Marathon

Sun, May 2 · Fort Collins, CO Fort Collins

Road 2027 10k5K5K +10

From $0 Open Closing Soon

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Colterris Wine Run 5k

Sat, May 8 · Palisade, CO Palisade

Road 5k5k

From $30 Open

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Hometown Half Marathon/5K/10K - Colorado Springs

Sat, May 8 · Colorado Springs, CO Colorado Springs

Virtual 1 Mile1 Mile5K +11

From $17 Open 5 spots left

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Run for Chocolate 5k/10k/13.1 DENVER/AURORA

Sat, May 8 · Centennial, CO Centennial

Virtual Family 1 Mile Fun RunVirtual Run Registration5K Registration +3

From $30 Open

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Colorado Women's Classic - Westminster

Sun, May 9 · Westminster, CO Westminster

Road 5k5k10k +3

From $35 Open

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Hometown Half Marathon/5K/10K - Denver

Sun, May 9 · Denver, CO Denver

Virtual 1 Mile1 Mile5K +11

From $17 Open 5 spots left

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Run the Spruce 5K and 1K Fun Run

Sat, May 22 · Palmer Lake, CO Palmer Lake

Road Run the Spruce 1K Fun RunRun the Spruce 5K

From $20 Open

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SuperHeroes Run DENVER/AURORA

Sat, May 29 · Centennial, CO Centennial

Virtual Family 1 Mile Fun RunVirtual Run Registration5K/10K/13.1 Eco-Registration (No Shirt) +3

From $30 Open

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Weld Your Mettle Running Festival

Sat, Jun 5 · Eaton, CO Eaton

Virtual 7k walk or run (4.3 miles)7K Ruck (4.3 Miles)7k walk or run (4.3 miles) +23

From $35 Open Closing Soon

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Colorado 13er (Half Marathon/10k/5k)

Sun, Jun 6 · Louisville, CO Louisville

Road 5k5k10k +3

From $30 Open

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Summer Vibes Bike Rally & Run Festival

Sun, Jun 6 · Lyons, CO Lyons

Triathlon Trail Dog RunThe Beer RelayAltra Trail Run Relay +5

From $59 Open

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Flamingo Day 5K

Sun, Jun 6 · Denver, CO Denver

Road 5KVirtual 5KVirtual 5K +1

From $30 Open

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The Steamboat Marathon

Sun, Jun 6 · Steamboat Springs, CO Steamboat Springs

Road 10K10KHalf Marathon +3

From $65 Open

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All-Out Summer Breeze

Sat, Jun 12 · Arvada, CO Arvada

Virtual VIRTUAL 5K5K5K +9

From $20 Open

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Run Juneteenth Day 5K/10K/13.1 DENVER/AURORA

Sat, Jun 19 · Centennial, CO Centennial

Virtual Family Fun Run 1 MileVirtual Run Registration (5K/10K/13.1)5K Registration +3

From $30 Open

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Unicorn 5k (North)

Sat, Jun 19 · Thornton, CO Thornton

Road 1/2 (ish) Mile Saunter - untimed1/2 (ish) Mile Saunter - untimed5k Run/Walk +1

From $16 Open Closing Soon

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Treat Trot - Denver

Sat, Jun 19 · Denver, CO Denver

Virtual 5K5K10K +11

From $17 Open 5 spots left

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Treat Trot Colorado Springs

Sun, Jun 20 · Colorado Springs, CO Colorado Springs

Virtual 5K5K10K +11

From $17 Open 5 spots left

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Father's Day Classic 10k, 5k, & 1 Mile

Sun, Jun 20 · Arvada, CO Arvada

Road 1 Mile Fun Run (untimed)Manly Mile (TIMED - for MEN Only)1 Mile Fun Run (untimed) +9

From $8 Open

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South Fork Pandemonium

Fri, Jun 25 · South Fork, CO South Fork

Pandemonium-Family StylePandemonium-Main EventPandemonium-Main Event +1

From $20 Open 72 spots left

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Race in the Clouds - Alma Dirt Festival 2027

Fri, Jun 25 · Alma, CO Alma

Trail Highschool/Middle School Short Course (6.1miles)Highschool/Middle School Short Course (6.1miles)Trail 10K +21

From $0 Open 10 spots left

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Cookie Chase

Sat, Jul 10 · Denver, CO Denver

Road Virtual 5KVirtual 5K5K +1

From $30 Open

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All-Out Dog Days

Sat, Jul 10 · Westminster, CO Westminster

Virtual VIRTUAL 5K5KVIRTUAL 5K +9

From $20 Open

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