Colorado Half Marathons
Official Walker Friendly Half Marathons in Colorado
18:32 mile / 4 Hour Minimum course time limit= (W)
Symbol only applies to half marathon events
Trail Half Marathons (T)
Does NOT meet the Walker Friendly 4 hour minimum (18:32 / mi) = Not Walker Friendly (NWF)
Date
Sat Jan 7, 2023 (W)
Sun Jan 15, 2023 (NWF)
Sat Jan 22, 2022
Sat Feb 4, 2023
Sun Feb 13, 2022 (NWF)
Sat Feb 19, 2022
Sun Feb 20, 2022 (W)
All-Out Mardi Crawl Half Marathon, 10k, 5k, 1 Mile
Super Half Marathon & 5k Run/Walk
Snowman Stampede Half Marathon, 10k, 5k
Location
Arvada, CO
Louisville, CO
Littleton, CO
Lakewood, CO
Colorado Springs, CO
Littleton, CO
Arvada, CO
Sun Mar 6, 2022 (NWF)
Sat Mar 11, 2023 (W)
Sun Mar 19, 2023 (W)
Sun Mar 20, 2022 (NWF)
That Dam 13.1 & 5k Crush that Dam
Run Through Time Marathon, Half Marathon, 2-Mile
All-Out Spring Fever Half Marathon, 10k, 5k, 1 Mile
Greenwood Village, CO
Salida, CO
Golden, CO
Fort Collins, CO
Sun Apr 2, 2023 (NWF)
Sat Apr 8, 2023 (W)
Sun Apr 2, 2022 (W)
Sat Apr 15, 2023 (W)
Sun Apr 16, 2023 (W)
Sun Apr 16, 2023 (NWF)
Sun Apr 17, 2022 (T)
Sat Apr 23, 2022 (T)
Platte River Half Marathon & Relay (3 hour time limit)
Runs with Scissors Half Marathon, Marathon, 50k
All-Out Beat the Heat Marathon, Half Marathon, 10k, 5k, 1 Mile
Spring Fling Prairie Dog Half Marathon (3.5 hour time limit)
Desert RATS Trail Running Festival Half Marathon (1600 elv gain), 10k
Littleton, CO
Brighton, CO
Aurora, CO
Westminster, CO
Fort Collins, CO
Arvada, CO
Fruita, CO
Westminster, CO
Sun May 7, 2023
Sat May 7, 2022
Sat May 20, 2023 (T)
Sun May 21, 2023
Sun May 22, 2022
Colorado Marathon, Half Marathon, 10k, 5k
Valkyrie Trail Race 50k, Marathon Half Marathon, 4mi
Denver Colfax Marathon & Half Marathon
Fort Collins, CO
Firestone, CO
Colorado Springs, CO
Aurora, CO
Brighton, CO
Sat Jun 4, 2022
Sat Jun 3, 2023 (W)
Sat Jun 4, 2022 (T)
Sat Jun 4, 2022
Sun Jun 5, 2022
Sun Jun 4, 2023 (W)
Sun Jun 11, 2022
Sat Jun 18, 2022 (T)
Sun Jun 19, 2022 (W)
Sat Jun 25, 2022 (W)
Sat Jun 25, 2022 (W)
Runoff Runoff Marathon, Half Marathon, & 6k
Revel Rockies Marathon & Half Marathon
Colorado 13er (13.1mi), 10k, 5k
Steamboat Marathon, Half Marathon & 10K
BBSC Boulder Rez Half Marathon, 10k, 5k & Relay
Mountain Ridge Trail Half Marathon & 10k
Estes Park Marathon, Half Marathon, 10k, 5k
Creede, CO
Morrison, CO
Evergreen, CO
Basalt, CO
Louisville, CO
Steamboat Springs, CO
Boulder, CO
Highlands Ranch, CO
Estes Park, CO
Georgetown, CO
Arvada, CO
Tue Jul 4, 2023
Sat Jul 16, 2022
Sat Jul 16, 2022 (NWF)
Sun Jul 17, 2022 (T)
Sat Jul 23, 2022 (W)
Sat Jul 23, 2022 (T)
Sat July 30, 2022
Aspen Valley Marathon, Half Marathon, 5k
Summer Splash Prairie Dog Half Marathon
Black Hawk Trail Half Marathon & 10k
All-Out Dog Days Half Marathon, 10k, 5k, 1 mile
Living Journeys Synergy Athlete Half Marathon
Longmont, CO
Aspen, CO
Castle Rock, CO
Golden, CO
Westminster, CO
Crested Butte, CO
Estes Park, CO
Sat Aug 6, 2022
Sun Aug 7, 2022 (T)
Sat Aug 13, 2022
Sat Aug 13, 2022
Sat Aug 20, 2022 (W)
Sat Aug 20, 2022 (W)
Sat Aug 20, 2022
Sun Aug 21, 2022 (NWF)
Sat Aug 27, 2022 (T)
Sat Aug 27, 2022
Sat Aug 27, 2022 (NWF)
Fort Collins Human Race Half Marathon, 10k, 5k
The Emerald Mountain Epic Marathon & Half Marathon
Georgetown to Idaho Springs Half Marathon
Boulder Rez Marathon, 3/4 Marathon, Half Marathon, 10k, Relay
All-Out Runapalooza Half Marathon, 10k, 5k, 1 Mile
Dynafit Arrowhead Half Marathon, 10k, 5k
Louisville Trail Half Marathon, 10k, 5k
Staunton Rocks! Marathon & Half Marathon
Fort Collins, CO
Steamboat Springs, CO
Georgetown, CO
Boulder, CO
Ouray, CO
Arvada, CO
Vail, CO
Erie, CO
Louisville, CO
Pine, CO
Durango, CO
Mon Sep 5, 2022
Sat Sep 10, 2022 (T)
Sat Sep 10, 2022
Sat Sep 10, 2022
Sat Sep 17, 2022 (W)
Sat Sep 17, 2022 (W)
Sat Sep 17, 2022 (T)
Sat Sep 17, 2022 (T)
Sat Sep 17, 2022
Sun Sep 18, 2022 (W)
Sat Sep 24, 2022 (NWF)
Sun Sep 25, 2022 (T)
Labor Day Half Marathon, 10k, 5k
Ned * Ned Half Marathon, 10k, 5k
Winter Park Half Marathon & 5k
Autumn Color Half Marathon, 10k, 5k
All-Out Fallfest Marathon, Half Marathon, 10k, 5k, 1 Mile
Snow Mountain Ranch Trail Half Marathon, 10k, 5k
Beulah Challenge Half Marathon, 10k, 5k Trail Run & Walk
Fall Equinox Half Marathon & 5 Mile
"The Pioneer" Prairie Dog Half Marathon & 10k Westminster
Parker, CO
Fort Collins, CO
Nederland, CO
Fraser, CO
Westminster, CO
Buena Vista, CO
Snowmass, CO
Granby, CO
Beulah, CO
Fort Collins, CO
Westminster, CO
Morrison, CO
Sat Oct 1, 2022
Sat Oct 1, 2022 (W)
Mon Oct 3, 2022
Sun Oct 9, 2022
Sun Oct 9, 2022
Sun Oct 9, 2022
Sat Oct 15, 2022
Sun Oct 16, 2022 (W)
Sun Oct 30, 2022 (W)
Colorado Springs Marathon & Half Marathon
Long View Marathon & Half Marathon
Center of the Nation Series Marathon, Half Marathon, 50/10/5k (day 1)
Boulderthon Downtown Edition 13.1 & 26.2
Windsor Marathon, Half Marathon, 10k, 5k
Colorado Springs, CO
Fort Collins, CO
Sterling, CO
Boulder, CO
Brighton, CO
Windsor, CO
Mancos, CO
Westminster, CO
Golden, CO
Sat Nov 6, 2021
Sat Nov 5, 2022 (T)
Mon Nov 7, 2022 (W)
Rim Rock Marathon, Half Marathon, & Relay
HRCA Backcountry Wilderness Half Marathon 2021 Registration
Mainly Marathons Southwest Series 26.2mi, 13.1mi, 50/10/5k (day 2)
Fruita, CO
Highlands Ranch, CO
Durango, CO
Sat Dec 3, 2022 (W)
Sat Dec 3, 2022 (W)
Sun Dec 4, 2022
Westminster, CO
Ute Mountain, CO
Pueblo, CO
Colorado Half Marathon Calendar event dates in grey are delinquent dates not updated by the race organizer yet. We strive to have dates 1 year out for Colorado half marathons, but have no control of when they set, announce or update their dates.
The Colorado Half Marathon Calendar is a complete simplistic listing of half marathons in Colorado. Currently the Colorado half marathon schedule has 2022 Colorado half marathons and 2023 Colorado half marathons as they roll in. Colorado half marathons 2022 & Colorado half marathons 2023 also identify trail half marathons and walker friendly half marathons by a (T) symbol and a (W) symbol. The (T) means it is a TRUE trail half marathon (off road, switchbacks, etc) and a (W) means it is truly "official walker friendly" requiring the half marathon to allow a minimum of 18:32 mile pace, minimum 4 hours for participants to finish the 13.1 mile distance.
The Colorado half marathon schedule of course features races such as Rock'n'Roll Denver Marathon and Rock'n'roll Denver Half marathon, along with a complete listing of Colorado half marathons, Denver half marathons, Ft. Collins half marathons, Colorado Springs half marathons, Boulder half marathons, Rocky Mountain half marathons, Vail half marathons, and many more half marathons in Colorado.
A half marathon is 13.1 miles (or in kilometers is a 21k). We understand sometimes there will be a slight margin of error up or down when runners run or walk any race distance, however our calendar only is a listing for true half marathons that do all they can to measure their course as an official half marathon 13.1 mile / 21k distance. Races that are not 13.1 miles, we encourage not to call their race a 1/2 marathon to lessen confusion for runners & walkers looking to participate in a true 1/2 marathon distance. Some runners don't care, but you'd be surprised how many that do.