runvibe
ListFind my crew
•95 upcoming races

Race season across
Denver–Boulder.

Every upcoming races in Denver–Boulder — dates, start lines and registration, with the crews to train with listed right beside them.

Just this weekend →

Browse by distance

All races955K7210K17Half Marathon15Marathon4

Showing 61–90 of 95

November

3 races
Fort CollinsFort Collins Thanksgiving Day RunOther distancesLittletonGobble Wobble Run5KDenverHarvesting Hope 5k5K

December

7 races
DenverRMRR December 4.5miOther distancesLittletonSanta Shuffle 5K5KDenverJingle Bell Run - Colorado5KOther distancesDenverSanta's Dash for Ca$h5KFort CollinsSweaty Sweater 5k5KOther distancesRegistration closedDenverUgly Sweater 5K5KFort CollinsResolution Run - Fort Collins5KRegistration closed

January 2027

2 races
DenverFreakin Freezin 5K - Denver5KDenverTime Travel Half-Marathon/5K/10K - Denver5K10KHalf MarathonOther distances

March 2027

3 races
Fort CollinsSharin' O' The Green 5k5KRegistration closedDenverTime to Paddy 5K/10K & Lucky 13.1 13.1 - Denver5K10KHalf MarathonOther distancesDenverCentral Park 5k5K

April 2027

5 races
DenverDonut Dash5KLittletonPlatte River Half-Marathon, Relay & 5k5KHalf MarathonFort CollinsHorsetooth Half Marathon - Presented by Fort Collins ConnexionHalf MarathonDenverDoNot Stop Half Marathon/5K/10K - Denver5K10KHalf MarathonOther distancesDenverUnicorn 5k (Denver-East)5K

May 2027

6 races
BoulderEmerge 5K5KRegistration closedFort CollinsThe Colorado Marathon5K10KHalf MarathonMarathonDenverDenver Mother's Day 5K5KRegistration closedDenverHometown Half Marathon/5K/10K - Denver5K10KHalf MarathonOther distancesCity Park, Denver, CO, USA · DENVERDenver Colfax MarathonMarathonCity Park, Denver, CO, USA · DenverDenver Colfax Merchandise Store

June 2027

4 races
DenverFlamingo Day 5K5KFort CollinsM1LE Nation ChallengeOther distancesRegistration closedBoulderAlpha 5K Challenge5KRegistration closedDenverTreat Trot - Denver5K10KOther distances

Race listings sync daily from RunSignup and Race Roster, and are not individually verified the way RunVibe's club listings are.

Train with a crew

A start line is easier with people who run your pace all season. All 33 run clubs in Denver–Boulder →

Free training plans, week by week →