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Fall 2026

Fall Marathons in Colorado

7 fall marathons in Colorado from September to November 2026. Race days typically run from 43°F at dawn to 67°F in the afternoon. A typical entry fee is $130. Dates and fees come straight from race registration and refresh every night.

7
fall marathons
5
cities
67°F
typical race-day high
$130
typical entry fee

October 2026

November 2026

Quick answers

When are fall marathons in Colorado?
The season runs September to November. The busiest month is October, with 6 of the 7 races listed here; November has 1.
What is the weather like for fall marathons in Colorado?
Across 6 of these races, race day typically runs from about 43°F at dawn to 67°F in the afternoon, with rain on about 9 percent of days. Most start early, close to the low.
How much does a fall marathon cost?
Current entry fees in Colorado usually run from $105 to $133, with a typical fee of $130 before processing fees. Most raise prices as race day nears.