Colorado close

Colorado Marathon Calendar 2024-2025

Header image

Explore the best marathons in Colorado for 2024-2025! Our updated list features 17 exciting races across the state. Find your next race in Colorado below and join the running community at these great events!

March 2025
Mar
8
Saturday

Run Through Time Trail Marathon

Trail Run 3 km 21 km 42 km
Mar
8
Saturday

Winter's End Snowshoe Races

Trail Run 2 mi 8 mi 16 mi 26 mi
April 2025
Apr
26
Saturday

Runs With Scissors Races

21 km 42 km 50 km
May 2025
May
4
Sunday

Colorado Marathon

5 km 10 km 13 mi 26 mi
May
10
Saturday

Valkyrie Trail Race

Trail Run 4 mi 8 mi ... 26 mi 50 km
May
17-18
Sa - Su

Denver Colfax Marathon

5 km 10 mi 13 mi 26 mi
May
25
Sunday

Spirit Trail Run

Trail Run 9 km 13 mi 26 mi
June 2025
Jun
1
Sunday

Steamboat Marathon

10 km 13 mi 26 mi
Jun
28
Saturday

Leadville Trail Marathon and Heavy Half

Trail Run 13 mi 26 mi
July 2025
Jul
19
Saturday

Silverton Alpine Marathons

Trail Run 8 mi 26 mi 50 km
August 2025
Aug
2
Saturday

Boulder Rez Marathon

Trail Run 10 km 21 km 31 km 42 km
Aug
16
Saturday

Mt. Sneffels Marathon

10 km 13 mi 26 mi
September 2025
Sep
20-21
Sa - Su

Pikes Peak Ascent and Marathon

Trail Run 13 mi 26 mi
Sep
28
Sunday

Run Boulderthon: The Boulder Marathon

5 km 10 km 13 mi 26 mi
October 2025
Oct
4
Saturday

West Elk Challenge

Trail Run 26 mi
Oct
4
Saturday

Colorado Springs Marathon

5 km 13 mi 26 mi
Oct
11
Saturday

Breckenridge Road Marathon

10 km 13 mi 26 mi