Barr Lake
📍 Brighton, CO•📅 Saturday, Jun 13, 2026•1 events
50K, 30K, Half Marathon, 15K, 5K
Race guides
Half Marathon Races, Co
Browse upcoming races and find your next event.
Found 45 upcoming races•Updated daily•Last updated: Jun 9
Barr Lake
📍 Brighton, CO•📅 Saturday, Jun 13, 2026•1 events
Half Marathon
Quick registration
Half Marathon
Starts 6/13/2026, 12:00:00 AM
Register Half Marathon
Alerts
Red, White and Brew 5k, 10k & Half Marathon
📍 Windsor, CO•📅 Saturday, Jun 20, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 6/20/2026, 7:30:00 AM• Current price: $65
Register 13.1 Miles
Alerts
Slacker Half Marathon-Relay-4-Mile Races
📍 Georgetown, CO•📅 Saturday, Jun 27, 2026•4 events
13.1 Miles13.1 Miles13.1 Miles13.1 Miles
Quick registration
13.1 Miles
Starts 6/27/2026, 12:01:00 AM• Current price: $90
Register 13.1 Miles
Alerts
6th Annual July 4th ROCK-IT RUN
📍 Castle Rock, CO•📅 Saturday, Jul 4, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 7/4/2026, 10:30:00 AM• Current price: $55
Register 13.1 Miles
Alerts
Heatwave Half Marathon - Denver
📍 Littleton, CO•📅 Saturday, Jul 11, 2026•3 events
13.1 Miles13.1 Miles13.1 Miles
Quick registration
13.1 Miles
Starts 7/11/2026, 7:00:00 AM• Current price: $55
Register 13.1 Miles
Alerts
Heatwave Half Marathon - Colorado Springs
📍 Colorado Springs, CO•📅 Sunday, Jul 12, 2026•3 events
13.1 Miles13.1 Miles13.1 Miles
Quick registration
13.1 Miles
Starts 7/12/2026, 7:00:00 AM• Current price: $42
Register 13.1 Miles
Alerts
Aspen Valley Marathon
📍 Aspen, CO•📅 Saturday, Jul 25, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 7/25/2026, 7:30:00 AM• Current price: $160
Register 13.1 Miles
Alerts
Aspen Backcountry
📍 Aspen, CO•📅 Saturday, Aug 1, 2026•1 events
Heavy Half Marathon
Quick registration
Heavy Half Marathon
Starts 8/1/2026, 12:00:00 AM
Aspen Backcountry
📍 Aspen, CO•📅 Saturday, Aug 1, 2026•1 events
50 Kilometer, Marathon, Heavy Half Marathon
Bound for Boston Marathon & Half Marathon - Denver
📍 Denver, CO•📅 Sunday, Aug 2, 2026•2 events
13.1 Miles13.1 Miles
Quick registration
13.1 Miles
Starts 8/2/2026, 6:30:00 AM• Current price: $45
Register 13.1 Miles
Alerts
Choice City Running Festival
📍 Fort Collins, CO•📅 Friday, Aug 7, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 8/8/2026, 6:30:00 AM• Current price: $65
Register 13.1 Miles
Alerts
Westminster Trail Races
📍 Westminster, CO•📅 Saturday, Aug 15, 2026•1 events
50K, 35K, Half Marathon, 10K, 5K
Westminster Trail Races
📍 Westminster, CO•📅 Saturday, Aug 15, 2026•1 events
Half Marathon
Quick registration
Half Marathon
Starts 8/15/2026, 12:00:00 AM
Register Half Marathon
Alerts
Bagel Run 5K/10K/13.1 DENVER/AURORA
📍 Centennial, CO•📅 Saturday, Aug 15, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 8/15/2026, 7:30:00 AM• Current price: $45
Register 13.1 Miles
Alerts
Byers Peak Stampede Half Marathon & 5K Run
📍 Fraser, CO•📅 Saturday, Aug 22, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 8/22/2026, 8:00:00 AM• Current price: $65
Register 13.1 Miles
Alerts
Staunton Rocks! Marathon and Half Marathon
📍 Pine, CO•📅 Saturday, Aug 22, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 8/22/2026, 12:00:00 PM• Current price: $90
Register 13.1 Miles
Alerts
Golden Harvest Half Marathon & 5k/10k - Denver
📍 Westminster, CO•📅 Saturday, Sep 5, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 9/5/2026, 8:00:00 AM• Current price: $48
Register 13.1 Miles
Alerts
Golden Harvest Half Marathon & 5k/10k - Colorado Springs
📍 Colorado Springs, CO•📅 Sunday, Sep 6, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 9/6/2026, 8:00:00 AM• Current price: $48
Register 13.1 Miles
Alerts
Labor Day Half Marathon
📍 Parker, CO•📅 Monday, Sep 7, 2026•2 events
13.1 Miles13.1 Miles
Quick registration
13.1 Miles
Starts 9/7/2026, 7:00:00 AM• Current price: $63
Register 13.1 Miles
Alerts
Snow Mountain Ranch
📍 Granby, CO•📅 Saturday, Sep 12, 2026•1 events
50K, 33K, Half Marathon, 10K, 5K
Black Squirrel Half Marathon
📍 Bellvue, CO•📅 Saturday, Sep 12, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 9/12/2026, 7:00:00 AM• Current price: $90
Register 13.1 Miles
Alerts
Trail Sisters Women's Half Marathon & 10k
📍 Buena Vista, CO•📅 Saturday, Sep 12, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 9/12/2026, 8:00:00 AM• Current price: $85
Register 13.1 Miles
Alerts
Beulah Challenge and OverIt Series
📍 Beulah, CO•📅 Saturday, Sep 19, 2026•2 events
13.1 Miles13.1 Miles
Quick registration
13.1 Miles
Starts 9/19/2026, 8:00:00 AM• Current price: $75
Register 13.1 Miles
Alerts
Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado
📍 Boulder, CO•📅 Sunday, Sep 27, 2026•2 events
13.1 Miles13.1 Miles
Quick registration
13.1 Miles
Starts 9/27/2026, 7:00:00 AM• Current price: $500
Register 13.1 Miles
Alerts
Red Feather Trail Jamboree
📍 Red Feather Lakes, CO•📅 Friday, Sep 25, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 9/27/2026, 12:30:00 PM• Current price: $90
Register 13.1 Miles
Alerts
The Bear Chase
📍 Lakewood, CO•📅 Saturday, Oct 3, 2026•1 events
100K, 50 Mile, 50K, Half Marathon Sunday, 10K Sunday, 5K Sunday
Colorado Springs Marathon, Half, 5K, and Kids K
📍 Colorado Springs, CO•📅 Saturday, Oct 3, 2026•4 events
13.1 Miles13.1 Miles13.1 Miles13.1 Miles
Quick registration
13.1 Miles
Starts 10/3/2026, 12:00:00 AM• Current price: $70
Register 13.1 Miles
Alerts
Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon
📍 Canon City, CO•📅 Saturday, Oct 3, 2026•2 events
13.1 Miles13.1 Miles
Quick registration
13.1 Miles
Starts 10/3/2026, 7:30:00 AM• Current price: $80
Register 13.1 Miles
Alerts
Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA
📍 Centennial, CO•📅 Saturday, Oct 10, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 10/10/2026, 7:30:00 AM• Current price: $45
Register 13.1 Miles
Alerts
Bagel Run 5K/10K/13.1 DENVER/AURORA
📍 Centennial, CO•📅 Saturday, Oct 10, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 10/10/2026, 7:30:00 AM• Current price: $45
Register 13.1 Miles
Alerts
Durango Marathon
📍 Durango, CO•📅 Sunday, Oct 11, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 10/11/2026, 8:15:00 AM• Current price: $75
Register 13.1 Miles
Alerts
Mancos Cowboy Half Marathon, 5K, and Fun Run
📍 Mancos, CO•📅 Saturday, Oct 24, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 10/24/2026, 8:00:00 AM• Current price: $65
Register 13.1 Miles
Alerts
Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA
📍 Centennial, CO•📅 Saturday, Oct 31, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 10/31/2026, 7:30:00 AM
Register 13.1 Miles
Alerts
HRCA Backcountry Wilderness Half Marathon
📍 Lone Tree, CO•📅 Saturday, Nov 7, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 11/7/2026, 9:00:00 AM• Current price: $65
Register 13.1 Miles
Alerts
Louisville Trail Race
📍 Louisville, CO•📅 Saturday, Nov 14, 2026•1 events
Half Marathon, 10K, 5K
Coffee Lovers Run 5K/10K/13.1 DENVER/AURORA
📍 Centennial, CO•📅 Saturday, Nov 28, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 11/28/2026, 7:30:00 AM• Current price: $45
Register 13.1 Miles
Alerts
Rock Canyon Half Marathon- 40th Anniversary Run!
📍 Pueblo, CO•📅 Sunday, Dec 6, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 12/6/2026, 8:30:00 AM• Current price: $55
Register 13.1 Miles
Alerts
A Merry Christmas Run 5K/10K/13.1 DENVER/AURORA
📍 Centennial, CO•📅 Saturday, Dec 26, 2026•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 12/26/2026, 7:30:00 AM• Current price: $45
Register 13.1 Miles
Alerts
Stories Trail Runs
📍 Colorado Springs, CO•📅 Saturday, Feb 6, 2027•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 2/7/2027, 12:00:00 PM• Current price: $80
Register 13.1 Miles
Alerts
22nd Annual Run Through Time Trail Marathon and Half Marathon
📍 Salida, CO•📅 Saturday, Mar 13, 2027•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 3/13/2027, 9:00:00 AM
Register 13.1 Miles
Alerts
Lucky Brew Race 5K, 10K, 15k & Half Marathon
📍 Severance, CO•📅 Sunday, Mar 14, 2027•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 3/14/2027, 8:00:00 AM• Current price: $70
Register 13.1 Miles
Alerts
Platte River Half-Marathon, Relay & 5k
📍 Littleton, CO•📅 Sunday, Apr 11, 2027•2 events
13.1 Miles13.1 Miles
Quick registration
13.1 Miles
Starts 4/11/2027, 7:00:00 AM• Current price: $70
Register 13.1 Miles
Alerts
50 States Half Marathon Club General Membership
📍 Colorado Springs, CO•📅 Friday, Feb 10, 2034•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 2/10/2034, 12:00:00 AM• Current price: $85
Register 13.1 Miles
Alerts
Fifty States Half Marathon Club Life Membership
📍 Colorado Springs, CO•📅 Saturday, Feb 11, 2034•1 events
13.1 Miles
Quick registration
13.1 Miles
Starts 2/11/2034, 12:00:00 AM• Current price: $429
Register 13.1 Miles
Alerts