2017 - 2018 Colorado Half Marathon Calendar

Browse our Half Marathon Calendar for races organized in Colorado among 117 races.

117 races

Colorado Springs Marathon

September 30, 2017 Race day in 5 days
USA / Mountain Region / Colorado / Colorado Springs
Half Marathon
Road Running

Beulah Challenge

October 07, 2017 Race day in 12 days
USA / Mountain Region / Colorado / Beulah Valley
Half Marathon
Trail

Castle Rock Trail Festival

October 07, 2017 Race day in 12 days
USA / Mountain Region / Colorado / Castle Rock
Half Marathon
Trail

Moonlight Miles 10k & Half Marathon

October 07, 2017 Race day in 12 days
USA / Mountain Region / Colorado / Clifton
Half Marathon

The Beulah Challenge

October 07, 2017 Race day in 12 days
USA / Mountain Region / Colorado / Beulah
Half Marathon
Trail

Boulder Rez Marathon

October 08, 2017 Race day in 13 days
USA / Mountain Region / Colorado / Boulder Reservoir, Boulder
Half Marathon
Flat

Louisville Trail Half Marathon and 10K

October 08, 2017 Race day in 13 days
USA / Mountain Region / Colorado / Louisville
Half Marathon
Trail Endurance Race Series

Louisville Trail Half Marathon, 10K, 5K

October 08, 2017 Race day in 13 days
USA / Mountain Region / Colorado / Louisville
Half Marathon
Trail Endurance Race Series

Xterra Marathon of Trail Races

October 08, 2017 Race day in 13 days
USA / Mountain Region / Colorado / Colorado Springs
Half Marathon
Trail

Transamerica Rock 'n' Roll Denver

October 15, 2017 Race day in 20 days
USA / Mountain Region / Colorado / Denver
Half Marathon
Road Running Rock ‘n’ Roll Marathon Series Relay

All-Out Kooky-Spooky 1M, 5K, 10K, & Half Marathon

October 29, 2017 Race day in about 1 month
USA / Mountain Region / Colorado / Golden
Half Marathon

Kooky-Spooky

October 29, 2017 Race day in about 1 month
USA / Mountain Region / Colorado / Golden
Half Marathon
All-Out Multisport Productions
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