Marathons in Colorado 2027
20 marathons and 23 half marathons coming up in Colorado, by date. Rated races show how many minutes the course adds or saves against an average road race, from its climbing, surface and typical race-day weather.
Flattest marathons in Colorado
Rated road races, least total climbing first.
- 1.Aspen Valley MarathonAspen, 48m climbing, -5 min vs average, July 2027
- 2.Colorado MarathonFort Collins, 63m climbing, -10 min vs average, May 2027
- 3.Bound for Boston (Denver) MarathonDenver, 117m climbing, +9 min vs average, Aug 2027
- 4.Long View MarathonColorado, 191m climbing, -3 min vs average, Nov 2027
- 5.Colfax MarathonDenver, 211m climbing, +2 min vs average, May 2027
- 6.Steamboat MarathonSteamboat Springs, 224m climbing, 0 min vs average, June 2027
- 7.BoulderthonBoulder, 255m climbing, +8 min vs average, Sept 2027
- 8.Breckenridge Road MarathonBreckenridge, 339m climbing, 0 min vs average, Oct 2027
Flattest half marathons in Colorado
Rated road races, least total climbing first.
- 1.Aspen Valley Half MarathonAspen, 35m climbing, -1 min vs average, July 2027
- 2.Denver Colfax Half MarathonDenver, 80m climbing, -1 min vs average, May 2027
- 3.Rim Rock Half MarathonGrand Junction, 135m climbing, -1 min vs average, Nov 2027
- 4.Rocky Mountain Half & 5KEstes Park, 220m climbing, +4 min vs average, Aug 2027
- 5.Estes Park Half MarathonEstes Park, 279m climbing, +5 min vs average, June 2027
- 6.Golden Leaf Half MarathonAspen, 528m climbing, +12 min vs average, Sept 2027
Marathons in Colorado (20)
Mar 2027
- 13 Mar 2027 Run Through Time Marathon, Salida, Colorado
Apr 2027
- 25 Apr 2027 Run with Scissors Marathon, Brighton, Colorado
May 2027
June 2027
Steamboat Marathon
0 minSteamboat Springs, Colorado
6 June 2027Road224m gainFull
Leadville Trail Marathon
+94 minLeadville, Colorado
27 June 2027Trail1757m gainFull
- 20 June 2027 Estes Park Marathon, Estes Park, Colorado
Aug 2027
- 15 Aug 2027 Boulder Rez Marathon, Boulder, Colorado
- 22 Aug 2027 Staunton Rocks! Marathon, Pine, Colorado
Sept 2027
Pikes Peak Marathon
+123 minManitou Springs, Colorado
18 Sept 2027Trail2364m gainFull
Boulderthon
+8 minBoulder, Colorado
26 Sept 2027Road255m gainFull
- 19 Sept 2027 Fall Equinox Marathon, Fort Collins, Colorado
Oct 2027
Colorado Springs Marathon
+19 minColorado Springs, Colorado
3 Oct 2027Mixed245m gainFull
Breckenridge Road Marathon
0 minBreckenridge, Colorado
9 Oct 2027Road339m gainFull
Blue Sky Marathon
+68 minFort Collins, Colorado
17 Oct 2027Trail1064m gainFull
- 3 Oct 2027 Windsor Marathon, Windsor, Colorado
Nov 2027
- 7 Nov 2027 Rim Rock Marathon, Grand Junction, Colorado
Half marathons in Colorado (23)
Mar 2027
- 13 Mar 2027 Run Through Time Trail Marathon and Half Marathon, Salida, Colorado
May 2027
- 30 May 2027 Bigfoot Half Marathon, Estes Park, Colorado
June 2027
- 6 June 2027 Steamworks Half Marathon, Durango, Colorado
- 6 June 2027 Colorado 13er (Half Marathon/10k/5k), Louisville, Colorado
- 27 June 2027 Slacker Half Marathon-Relay-4-Mile Races, Georgetown, Colorado
July 2027
- 11 July 2027 Heatwave Half Marathon - Denver, Denver, Colorado
- 11 July 2027 Heatwave Half Marathon - Colorado Springs, Colorado Springs, Colorado
Aug 2027
- 22 Aug 2027 Byers Peak Stampede Half Marathon & 5K Run, Fraser, Colorado
- 22 Aug 2027 Staunton Rocks! Marathon and Half Marathon, Pine, Colorado
- 29 Aug 2027 TBK Bank Thirsty 13 Half Marathon, Durango, Colorado
Sept 2027
- 5 Sept 2027 Labor Day Half Marathon, Parker, Colorado
- 12 Sept 2027 Trail Sisters Women's Half Marathon & 10k, Buena Vista, Colorado
- 12 Sept 2027 Black Squirrel Half Marathon, Bellvue, Colorado
Oct 2027
- 3 Oct 2027 Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run, Windsor, Colorado
- 3 Oct 2027 Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon, Canon City, Colorado
- 17 Oct 2027 Blue Sky Trail Marathon & Half Marathon, Fort Collins, Colorado
Nov 2027
- 6 Nov 2027 HRCA Backcountry Wilderness Half Marathon, Lone Tree, Colorado
Marathons in Colorado at a glance
- Busiest month: June 2027, with 7 races.
- A typical marathon here climbs about 245m in total (the median of 12 rated courses), against about 145m across the USA.
- A typical half marathon here climbs about 220m in total (the median of 6 rated courses), against about 113m across the USA.
- Hilliest: Pikes Peak Marathon, with 2364m of climbing (trail).
- Coolest race day on average: Run Through Time Marathon (Mar 2027, a typical high of 7°C). Warmest: Bound for Boston (Denver) Marathon (Aug 2027, 32°C).
Marathons in other states
- Alabama (18)
- Alaska (16)
- Arizona (19)
- Arkansas (19)
- California (153)
- Colorado (43)
- Connecticut (18)
- Florida (45)
- Georgia (USA) (33)
- Hawaii (16)
- Idaho (22)
- Illinois (36)
- Indiana (24)
- Iowa (18)
- Kansas (17)
- Kentucky (22)
- Louisiana (10)
- Maine (17)
- Maryland (25)
- Massachusetts (35)
- Michigan (58)
- Minnesota (24)
- Mississippi (9)
- Missouri (29)
- Montana (21)
- Nebraska (16)
- Nevada (17)
- New Hampshire (8)
- New Jersey (22)
- New Mexico (16)
- New York (74)
- North Carolina (42)
- Ohio (66)
- Oklahoma (11)
- Oregon (26)
- Pennsylvania (48)
- South Carolina (20)
- South Dakota (10)
- Tennessee (30)
- Texas (96)
- Utah (46)
- Vermont (10)
- Virginia (42)
- Washington State (67)
- West Virginia (17)
- Wisconsin (47)
- Wyoming (8)