Ultras in Colorado 2026 | Upcoming Races & Dates | My Next Race

There are 31 ultras in Colorado scheduled for 2026. The next is the BRR All-Comers Summer Track & Field Series #4 in Boulder on July 23. Colorado ultras run primarily July.

BRR All-Comers Summer Track & Field Series #4

Thu, Jul 23 · Boulder, CO Boulder

Steeplechase 3k100M200M +11

From $20 Open Closing Soon 15 spots left

Never Summer 100km & 60km

Fri, Jul 24 · Walden, CO Walden

Never Summer 60kmNever Summer 100kmThe Double (60km & 100km)

From $175 Open Closing Soon 20 spots left

Wild West Relay

Fri, Jul 31 · Fort Collins, CO Fort Collins

Wild West Relay - Get Your Ass Over the Pass - 12 person team (7-12 runners)Wild West Relay - Get Your Ass Over the Pass - High School TeamWild West Relay - Get Your Ass Over the Pass - Super Ultra team (1-3 runners) +1

From $660 Open Closing Soon

Eltuck Valley 5K - Lory Summer Trail Series

Tue, Aug 4 · Fort Collins, CO Fort Collins

Eltuck Valley 5k

From $25 Open

BRR All-Comers Summer Track & Field Series #5

Thu, Aug 6 · Boulder, CO Boulder

100M200M400M +9

From $20 Open 15 spots left

Summer Sizzler- Denver

Sat, Aug 8 · Thornton, CO Thornton

1 Mile5k10k +4

From $17 Open Closing Soon 5 spots left

Summer Sizzler- Colorado Springs

Sun, Aug 9 · Colorado Springs, CO Colorado Springs

1 Mile5K10K +4

From $17 Open Closing Soon 5 spots left

RiseUP Elevation Challenge

Tue, Sep 1 · Colorado Springs, CO Colorado Springs

Distance ChallengeElevation Challenge

From $20 Open

Golden Harvest Half Marathon & 5k/10k - Denver

Sat, Sep 5 · Westminster, CO Westminster

1 Mile5K10K +4

From $17 Open 5 spots left

Golden Harvest Half Marathon & 5k/10k - Colorado Springs

Sun, Sep 6 · Colorado Springs, CO Colorado Springs

1 Mile5K10K +4

From $17 Open 5 spots left

Flaming Foliage Relay - Idaho Springs to Buena Vista

Fri, Sep 11 · Idaho Springs, CO Idaho Springs

Flaming Foliage Relay - Ultra Team (4-5 Runners)Flaming Foliage Relay - 10 person Team (6-10 runners)Flaming Foliage Relay - Super Ultra (1-3 runners)

From $623 Open

2026 Lake Nighthorse Triathlon - Sprint and Olympic

Sat, Sep 12 · Durango, CO Durango

Sprint Relay - FemaleIndividual SprintSprint Relay - Male +2

From $85 Open Closing Soon

The Denver 5k

Sat, Sep 12 · Denver, CO Denver

5kFREE Kids Fun Run

From $0 Open

Jungle Dash

Sat, Sep 12 · Loveland, CO Loveland

Jungle DashMini's Jungle Dash

From $5 Closed

Sawatch Ascent

Sun, Sep 27 · Nathrop, CO Nathrop

50k

From $129 Open

Water For People World Water Classic

Fri, Oct 2 · Anywhere, CO Anywhere

Virtual 6kVirtual 60k BikeGet Creative

From $35 Open

Spooky Sprint - Denver

Sat, Oct 3 · Littleton, CO Littleton

1 Mile5K10K +4

From $20 Open 5 spots left

FAMpoint5k

Sat, Oct 3 · Grand Junction, CO Grand Junction

FAMpoint5k - The Race for the Rest of Us

From $20 Open

Turkey Trails- Denver

Sat, Nov 7 · Littleton, CO Littleton

1 Mile5K10K +4

From $17 Open 5 spots left

Turkey Trails - Colorado Springs

Sun, Nov 8 · Colorado Springs, CO Colorado Springs

1 Mile5k10k +4

From $17 Open 5 spots left

Alpine Bank Boulder Thanksgiving Day 5K

Thu, Nov 26 · Boulder, CO Boulder

5KKids 800M

From $15 Closed

The Pilgrimage Run 2026

Thu, Nov 26 · Erie, CO Erie

2 Mile Run / Walk4 Mile Run4 Mile Run (Chip Timed) +1

From $25 Open

Candy Cane Course - Colorado Springs

Sat, Dec 5 · Colorado Springs, CO Colorado Springs

1 Mile5K10K +4

From $22 Open 5 spots left

Candy Cane Course - Denver

Sun, Dec 6 · Westminster, CO Westminster

1 Mile5k10k +4

From $22 Open 5 spots left

WinterFest 5k & Fun Run

Sat, Dec 12 · Thornton, CO Thornton

5k Run/Walk -TIMED and ScoredFun Run/Walk (Untimed, approx .75 miles)

From $12 Open

2026 Jingle Bell Run - Colorado

Sun, Dec 13 · Denver, CO Denver

1 Mile5K TimedKids Run +1

From $25 Open

NoCo Urban Ultra & Relay

Sun, Apr 11 · Bellvue, CO Bellvue

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

From $65 Open

Unicorn 5k (Denver-East)

Sun, Apr 25 · Denver, CO Denver

5k5k1/2 Mile(ish) Saunter +1

From $13 Open

Greenland Trail Races

Sat, May 1 · Larkspur, CO Larkspur

4 Mile4M Trail Races8M Trail Race +9

From $25 Open

Weld Your Mettle Running Festival

Sat, Jun 5 · Eaton, CO Eaton

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

From $35 Closed

Red, White, and WARRIOR 5K

Sat, Jul 3 · Grand Junction, CO Grand Junction

Red, White, and WARRIOR 5KRed, White, and WARRIOR 5KLittle Sparkler Sprint +1

From $10 Open