Running Races in Colorado — 2026

There are 386 running races in Colorado in 2026 across 99 cities. The next upcoming race is the HRCA Happy Hour Half K in Littleton on June 19. Popular distances include 5K races, trail runs, half marathons.

Byers Peak Stampede Half Marathon & 5K Run

Sat, Aug 22 · Fraser, CO Fraser

Road 5KHalf Marathon

From $45 Open

Register →

Ram Run

Sat, Aug 22 · Denver, CO Denver

Virtual Ram Run Kids Race (12 and under) 1 mileRam Run - VirtualRam Run 5k Run

From $10 Open

Register →

Staunton Rocks! Marathon and Half Marathon

Sat, Aug 22 · Pine, CO Pine

Road Staunton Rocks! Half MarathonStaunton Rocks! Marathon

From $90 Open

Register →

Gunnison Valley Triathlon

Sat, Aug 22 · Gunnison, CO Gunnison

Triathlon Youth Team RelayTeam RelayKids Triathlon +1

From $25 Open

Register →

CEROX IRON + IRON X

Sat, Aug 22 · Frederick, CO Frederick

Cerox Iron X IndividualCerox Iron IndividualCerox Iron Teams of 2 +1

From $45 Open

Register →

Rebel Run 5k

Sun, Aug 23 · Denver, CO Denver

Virtual 5k Walk5k Run5k Virtual Race

From $10 Open

Register →

11th Annual Log Hill Hustle

Sun, Aug 23 · Ridgway, CO Ridgway

Road Hand Cycle - 5KLog Hill Hustle 5kLog Hill Hustle 10k +1

From $30 Open

Register →

Pioneer Prairie Dog Half, 10k & 5k

Sun, Aug 23 · Westminster, CO Westminster

Road 5k10kHalf Marathon

From $25 Open

Register →

Eltuck Valley 12K - Lory Summer Trail Series

Tue, Aug 25 · Bellvue, CO Bellvue

Trail Eltuck Valley 12k

From $25 Open

Register →

Unbridled Golf Classic

Thu, Aug 27 · Castle Rock, CO Castle Rock

Golf Classic - FoursomeGolf Classic - Single Player

From $175 Open

Register →

RexRun For PAWSitivity 2026 Trail Run/Walk

Sat, Aug 29 · Aurora, CO Aurora

Road Kids 1-mile Run/WalkFamily 5K Trail Walk5K Trail Run

From $20 Open

Register →

Run Like the Wind 5k / 2k / Dog Jog

Sat, Aug 29 · Allenspark, CO Allenspark

Road 2k Run / Walk5K Run

From $20 Open

Register →

TBK Bank Thirsty 13 Half Marathon

Sat, Aug 29 · Durango, CO Durango

Road Race Plus BrewfestJust The Race -- No Brewfest Ticket

From $85 Open

Register →

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

Sat, Aug 29 · Centennial, CO Centennial

Virtual Family 1 Mile Fun Run5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

Register →

Rocky Mountain 5K presented by School District 11

Sat, Aug 29 · Colorado Springs, CO Colorado Springs

Road Rocky Mountain 5K

From $35 Open

Register →

Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA

Sat, Aug 29 · Centennial, CO Centennial

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

From $30 Open

Register →

Glow & Roll: Illuminate What's Possible

Sat, Aug 29 · Littleton, CO Littleton

Virtual 1.6 Mile Walk/Run/Roll5K Walk/Run/RollVirtual Participant

From $35 Open

Register →

Run for Hope - Colorado Springs

Sat, Aug 29 · Colorado Springs, CO Colorado Springs

Virtual Memorial Mile5K Run/WalkVirtual Race

From $25 Open

Register →

Historic Elizabeth Main Street 5K & Family Color Run

Sat, Aug 29 · Elizabeth, CO Elizabeth

Road Family Color Run5K Run/Walk

From $10 Open

Register →

Bluffs Run 8K

Sun, Aug 30 · Lone Tree, CO Lone Tree

Trail 8K

From $30 Open

Register →

Wine Run 5k at The Winery at Holy Cross Abbey

Sun, Aug 30 · Canon City, CO Canon City

Road 5kVolunteer and Run 8:00am to 9:30amVolunteer with check-in 9:30am-11:00am then Run

From $15 Open 5 spots left

Register →

Raising the Barr

Sat, Sep 5 · Brighton, CO Brighton

Road 12 hour - Relay ULTRA (2-3 people)12 Hour - Relay STANDARD (4-8 people)6 Hour - Solo +3

From $55 Open

Register →

Cirque Series - Arapahoe Basin, CO

Sat, Sep 5 · Keystone, CO Keystone

Trail Sport Division (beginner / intermediate)Expert DivisionPro Division

From $90.15 Open

Register →

Break Your Neck: Walk, Run, or Roll

Sat, Sep 5 · Pueblo, CO Pueblo

Open

Register →

South Fork Alder Ass Race

Sat, Sep 5 · South Fork, CO South Fork

Virtual Alder Ass Race Mini CourseAlder Ass Race Standard CourseGhost Runners

From $40 Open

Register →

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

Sat, Sep 5 · Westminster, CO Westminster

Virtual 1 Mile5K10K +4

From $17 Open 5 spots left

Register →

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

Sun, Sep 6 · Colorado Springs, CO Colorado Springs

Virtual 1 Mile5K10K +4

From $17 Open 5 spots left

Register →

10k at 10,000 Feet

Sun, Sep 6 · Steamboat Springs, CO Steamboat Springs

Road 5k10k

From $25 Open

Register →

Oak Creek No Fun Run

Mon, Sep 7 · Oak Creek, CO Oak Creek

Road 5K

From $25 Open

Register →

Labor Day Half Marathon

Mon, Sep 7 · Parker, CO Parker

Road 5K10KVirtual Race +1

From $27 Open

Register →

FCA All-Abilities Labor Day 5K

Mon, Sep 7 · Loveland, CO Loveland

Virtual Mighty MileFCA All-Abilities Labor Day 5kVirtual Run Where You Are +1

From $10 Open

Register →

14th Annual Superhero Event

Thu, Sep 10 · Greeley, CO Greeley

Virtual Virtual 1 Mile1 Mile - 13+1 Mile - 12 & Under +5

From $20 Open

Register →

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

Register →

Spirit of the Valley 5k

Sat, Sep 12 · Grand Junction, CO Grand Junction

Road 5k Run5K Roll1K Roll +1

From $10 Open

Register →

For The City Network 5K

Sat, Sep 12 · Greeley, CO Greeley

Road For The City Network 5K

From $35 Open

Register →

Run for Mental Health 5K/10K/13.1 DENVER/AURORA

Sat, Sep 12 · Centennial, CO Centennial

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

From $30 Open

Register →

Trail Sisters Women's Half Marathon & 10k

Sat, Sep 12 · Buena Vista, CO Buena Vista

Trail Trail Sisters Women's 10kTrail Sisters Women's Half Marathon

From $55 Open

Register →

The Denver 5k

Sat, Sep 12 · Denver, CO Denver

Road 5kFREE Kids Fun Run

From $0 Open

Register →

Steele Trap Trail Run

Sat, Sep 12 · Loma, CO Loma

Road Steele Trap Trail Run

From $50 Open

Register →

2026 Lake Nighthorse Triathlon - Sprint and Olympic

Sat, Sep 12 · Durango, CO Durango

Triathlon Sprint Relay - CoedSprint Relay - FemaleSprint Relay - Male +2

From $85 Open

Register →

6 Dot Dash

Sat, Sep 12 · Littleton, CO Littleton

Virtual Virtual 5K5K

From $40 Open

Register →

The 10th Annual Run4Hope 5K for Schools

Sat, Sep 12 · Monument, CO Monument

Road 5K Run (Competitive Chip-Timed Race)2-Mile Color Fun Run - Individual2-Mile Color Fun Run - Family of 3 or more

From $30 Open

Register →

National Chocolate Day: Run for Chocolates 5K/10K/13.1 DENVER/AURORA

Sat, Sep 12 · Centennial, CO Centennial

Virtual Family 1 Mile Fun Run5K/10K/13.1 Eco-Registration (No Shirt)5K Registration +3

From $30 Open

Register →

Black Squirrel Half Marathon

Sat, Sep 12 · Bellvue, CO Bellvue

Road Black Squirrel Half Marathon

From $90 Open

Register →

53rd Annual Imogene Pass Run

Sat, Sep 12 · Telluride, CO Telluride

Trail 53rd Annual Imogene Pass Run

From $130 Open

Register →

RMRR September 5k/10k

Sun, Sep 13 · Thornton, CO Thornton

Road 5k10k

From $10 Open

Register →

Honey Bee Hustle

Sun, Sep 13 · Loveland, CO Loveland

Road Mini Honey Bee HustleChallenge

From $15 Open

Register →

Colorado Run for the Fallen Run/Walk/Ruck

Sun, Sep 13 · Palmer Lake, CO Palmer Lake

Road Run/Walk to RememberRuck to Remember

From $35 Open

Register →

Tiger Prowl 5K

Sun, Sep 13 · Denver, CO Denver

Road Tiger Prowl 5K Fun Run/WalkTiger Prowl Youth 5K---register your 12 and under child here*Tiger Prowl 5K Chill Option

From $15 Open

Register →

9/11 Heroes Run - Denver, Colorado

Sun, Sep 13 · Denver, CO Denver

Road 1-Mile Run/Walk5K Run - PUSHER5K Ruck +3

From $21 Open Closing Soon

Register →