26 Half Marathon Races in Denver, CO
Browse Half Marathon races in Denver, CO with dates, registration links, course maps, and exclusive RaceMob discounts.
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Found 26 races near Denver, CO
NOV
7
HRCA Backcountry Wilderness Half Marathon
Lone Tree, CO
• 20.3 miles
$65
-$95
The 18th Annual Backcountry Wilderness Half Marathon returns to Highlands Ranch on Saturday, November 7, 2026, at 9:00 a.m. This 13.1-mile race winds through the Douglas County East/West Trail...
DEC
5
All-Out Fa La La
Westminster, CO
• 26.0 miles
$25
-$85
Ho-ho-hit the trail this holiday season at the 15th Annual Fa La La 5K, 10K & half marathon! This festive run/walk benefits A Precious Child and takes you on a scenic journey along the Big Dry...
MAR
21
All-Out Spring Fever
Golden, CO
• 13.2 miles
$20
-$85
All-Out Multicourse is proud to host our 15th Annual Spring Fever, a rewarding event for both novice and experienced athletes set against the backdrop of Table Mountain and the stunning Colorado...
APR
11
Platte River Half-Marathon, Relay & 5k
Littleton, CO
• 10.1 miles
$40
-$255
Welcome to the Platte River Half Marathon, Relay & 5k race, one of the most exciting and popular races in the Denver Metro Area! This race is held annually in Littleton, CO. We’re thrilled to...
APR
24
All-Out Beat the Heat
Westminster, CO
• 10.7 miles
$20
-$85
Unleash your inner superhero at the 15th Annual Beat the Heat event! This year, we're calling all champions to assemble where one of Colorado's favorite trails joins one of its most glorious...
JUN
12
Summits Trail Runs
Granby, CO
• 53.0 miles
$60
-$160
The Human Potential Running Series Presents:The Summits Trail Runs @ Granby Ranch Resort The Summits Trail Runs occur at Granby Ranch Resort in Colorado's beautiful Rocky Mountains. These...
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