Marathon races in Colorado, United States — 2026 running calendar
19 events found
Aug
01
Bound for Boston Marathon & Half Marathon - Denver
Denver, Colorado, United States
Free - $75.00
Running
Marathon
Half-Marathon
Cheer Crew
+1
Aug
22
Staunton Rocks! Marathon and Half Marathon
Pine, Colorado, United States
Running
Marathon
Half-Marathon
Jul
25
Aspen Valley Marathon
Aspen, Colorado, United States
Running
Marathon
Half-Marathon
5K
May
24
2026 CKF Cape Town Marathon
Aspen, Colorado, United States
Running
Marathon
May
17
Colfax Marathon
Lone Tree, Colorado, United States
Running
Marathon
May
17
Girls on the Run Rockies Colfax SoleMates 2026
Denver, Colorado, United States
Running
Marathon
Half-Marathon
Mar
28
Race Through Colorado 1M, 5K, 10K, 13.1, 26.2 - Now Only $20!
Denver, Colorado, United States
$20.00
Running
1.6K
5K
10K
Half-Marathon
+1
Bound for Boston Marathon & Half Marathon - Denver
Denver, Colorado, United States
Aug 1, 2027 (Sun)
Free - $75.00
Running
Marathon
Half-Marathon
Cheer Crew
+1
Staunton Rocks! Marathon and Half Marathon
Pine, Colorado, United States
Aug 22, 2026 (Sat)
Running
Marathon
Half-Marathon
Aspen Valley Marathon
Aspen, Colorado, United States
Jul 25, 2026 (Sat)
Running
Marathon
Half-Marathon
5K
2026 CKF Cape Town Marathon
Aspen, Colorado, United States
May 24, 2026 (Sun)
Running
Marathon
Colfax Marathon
Lone Tree, Colorado, United States
May 17, 2026 (Sun)
Running
Marathon
Girls on the Run Rockies Colfax SoleMates 2026
Denver, Colorado, United States
May 17, 2026 (Sun)
Running
Marathon
Half-Marathon
Race Through Colorado 1M, 5K, 10K, 13.1, 26.2 - Now Only $20!
Denver, Colorado, United States
Mar 28, 2026 (Sat)
– Dec 31, 2026
$20.00
Running
1.6K
5K
10K
Half-Marathon
+1