157 Upcoming 5K Races Near Boulder, CO

Diplo's Run Club Denver

Denver, CO

Sunday, July 12th, 2026

Featured

Code:FTR10

View details for race Diplo's Run Club Denver

FCA All Abilities Labor Day 5K

Loveland, CO

Monday, September 7th, 2026

View details for race FCA All Abilities Labor Day 5K

FCA All-Abilities Labor Day 5K

Loveland, CO

Monday, September 7th, 2026

1 Mile

View details for race FCA All-Abilities Labor Day 5K

Labor Day Half Marathon

Parker, CO

Monday, September 7th, 2026

Half

10K

Fast

View details for race Labor Day Half Marathon

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14th Annual Superhero Event

Greeley, CO

Thursday, September 10th, 2026

10K

1 Mile

View details for race 14th Annual Superhero Event

NEDNED Trail Fest

Nederland, CO

Saturday, September 12th, 2026

Half

10K

Trail

View details for race NEDNED Trail Fest

2026 RiNo 5K + Larimer Mile

Denver, CO

Saturday, September 12th, 2026

View details for race 2026 RiNo 5K + Larimer Mile

For The City Network 5K

Greeley, CO

Saturday, September 12th, 2026

View details for race For The City Network 5K

6 Dot Dash

Littleton, CO

Saturday, September 12th, 2026

View details for race 6 Dot Dash

The Denver 5k

Denver, CO

Saturday, September 12th, 2026

View details for race The Denver 5k

9/11 Heroes Run - Denver, Colorado

Denver, CO

Sunday, September 13th, 2026

1 Mile

View details for race 9/11 Heroes Run - Denver, Colorado

NUN RUN

Centennial, CO

Sunday, September 13th, 2026

View details for race NUN RUN

RMRR September Trophy Series

Thornton, CO

Sunday, September 13th, 2026

10K

Fast

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Tiger Prowl 5K

Denver, CO

Sunday, September 13th, 2026

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Severance Glow 5K Run or Walk

Severance, CO

Friday, September 18th, 2026

Trail

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2026 Montbello Alive! 5K

Denver, CO

Saturday, September 19th, 2026

View details for race 2026 Montbello Alive! 5K

Denver: Walk With Autism and Resource Fair

Denver, CO

Saturday, September 19th, 2026

View details for race Denver: Walk With Autism and Resource Fair

Balanced Movement Yoga - Charity Fun 5K Walk/Ru...

Evans, CO

Saturday, September 19th, 2026

View details for race Balanced Movement Yoga - Charity Fun 5K Walk/Run (Dog-Friendly)

All-Out Fall Fest

Westminster, CO

Saturday, September 19th, 2026

Half

10K

Trail

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Miles 4 Madison 5K & 1K

Littleton, CO

Saturday, September 19th, 2026

View details for race Miles 4 Madison 5K & 1K

Gummball 5K

Brighton, CO

Saturday, September 19th, 2026

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Marine Memorial 5K

Arvada, CO

Saturday, September 19th, 2026

Trail

View details for race Marine Memorial 5K

Wellington STAR Foundation 5K 10K

Wellington, CO

Saturday, September 19th, 2026

10K

View details for race Wellington STAR Foundation 5K 10K

20th Annual Golden Gallop

Golden, CO

Sunday, September 20th, 2026

10K

Trail

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Expo Park XC Runs

Aurora, CO

Sunday, September 20th, 2026

View details for race Expo Park XC Runs

Farmers 5000

Wheat Ridge, CO

Sunday, September 20th, 2026

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Parker Parks and Recreation So Long to Summer 5...

Parker, CO

Saturday, September 26th, 2026

10K

View details for race Parker Parks and Recreation So Long to Summer 5K/10K

Runway 5K - Run for the Angels

Broomfield, CO

Saturday, September 26th, 2026

View details for race Runway 5K - Run for the Angels

Lisa Nelson’s Mustang Stampede 5K

Arvada, CO

Saturday, September 26th, 2026

View details for race Lisa Nelson’s Mustang Stampede 5K

HRCA Oktoberfest 5K

Littleton, CO

Saturday, September 26th, 2026

View details for race HRCA Oktoberfest 5K

NIGHT NATION RUN - DENVER

Commerce City, CO

Saturday, September 26th, 2026

View details for race NIGHT NATION RUN - DENVER

Joy & Justice 5k

Timnath, CO

Sunday, September 27th, 2026

1 Mile

View details for race Joy & Justice 5k

Running for Children's Rights to Both Parents -...

Boulder, CO

Sunday, September 27th, 2026

Half

10K

View details for race Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States

Flyin' Lion 5K

Littleton, CO

Sunday, September 27th, 2026

View details for race Flyin' Lion 5K

Lafayette Music Fest -5K - 10K

Lafayette, CO

Saturday, October 3rd, 2026

10K

View details for race Lafayette Music Fest -5K - 10K

Big Waves Family 5K run/walk Presented by Brumate

Westminster, CO

Saturday, October 3rd, 2026

View details for race Big Waves Family 5K run/walk Presented by Brumate

PRA Miner Gold Rush

Broomfield, CO

Saturday, October 3rd, 2026

1 Mile

View details for race PRA Miner Gold Rush

Homecoming 5K - Colorado State University

Fort Collins, CO

Saturday, October 3rd, 2026

View details for race Homecoming 5K - Colorado State University

Rut Run 5k

Estes Park, CO

Saturday, October 3rd, 2026

Trail

View details for race Rut Run 5k

I Can 5k

Thornton, CO

Saturday, October 3rd, 2026

View details for race I Can 5k

Spooky Sprint - Denver

Denver, CO

Saturday, October 3rd, 2026

1 Mile

10K

View details for race Spooky Sprint - Denver

Spooky Sprint - Denver

Littleton, CO

Saturday, October 3rd, 2026

1 Mile

10K

View details for race Spooky Sprint - Denver

RMRR October Trophy Series

Aurora, CO

Sunday, October 4th, 2026

Fast

View details for race RMRR October Trophy Series

Windsor Marathon, Half Marathon, 10k, 5k & 1 Mi...

Windsor, CO

Sunday, October 4th, 2026

Marathon

Half

10K

Trail

View details for race Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run

Your Story Isn't Over 5k/10k/Kids 1-Mile

Littleton, CO

Wednesday, October 7th, 2026

1 Mile

10K

View details for race Your Story Isn't Over 5k/10k/Kids 1-Mile

Footsteps for Families 5k Fun Run & Concert

Windsor, CO

Saturday, October 10th, 2026

View details for race Footsteps for Families 5k Fun Run & Concert

The Long View Marathon

Fort Collins, CO

Saturday, October 10th, 2026

Marathon

Half

View details for race The Long View Marathon

Westy Half & 5k

Westminster, CO

Sunday, October 11th, 2026

Half

View details for race Westy Half & 5k

Living Water 5K and Family Fun Run

Denver, CO

Saturday, October 17th, 2026

View details for race Living Water 5K and Family Fun Run

DU Crimson Classic 5K Run/1.5 Mile Walk

Denver, CO

Wednesday, October 21st, 2026

1 Mile

View details for race DU Crimson Classic 5K Run/1.5 Mile Walk

Apex Foundation Trick or Trot 5K & Halloween Hunt

Arvada, CO

Saturday, October 24th, 2026

1 Mile

View details for race Apex Foundation Trick or Trot 5K & Halloween Hunt

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