The 2023 event has concluded.

Boulderthon Marathon

Boulder, CO, USAOctober 08, 2023
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clear-day Clear conditions throughout the day.

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Area Map

Course Maps

FAQ

When is the 2023 Boulderthon Marathon?

The 2023 Boulderthon Marathon will be held on Sunday October 8, 2023.

Is the Boulderthon Marathon a Boston Marathon Qualfier?

Yes, the Boulderthon Marathon is an official Boston Marathon qualifier.

What is the time limit for the Boulderthon Marathon?

The time limit for the Boulderthon Marathon is 6.5 hours.

Community

Historical Weather

RunScore
Run Score: 8
Temp
71°F
Min/Max
45°/71°F
Dew
29°F
Days of Rain
0/3
Wind
4mph
Tap a row for details.
YearConditionsLow / HighRainRunScore
2023
clear-day
46°/ 77°-
Run Score: 8
2022
clear-day
43°/ 72°-
Run Score: 8
2021
clear-day
45°/ 66°-
Run Score: 8