Marathons in Iowa

As of October 6, 2026, Crewable lists 5 upcoming marathons in Iowa from October 2026 to November 2026. The next is Haunted 5K, 10K, 13.1M & 26.2M at Des Moines, IA (41) on October 10 in Des Moines. Registration is open for all 5.

Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites

Race calendar

October 2026

4 races

November 2026

1 race

Quick answers

What is the next marathon in Iowa?

Haunted 5K, 10K, 13.1M & 26.2M at Des Moines, IA (41), on Saturday, October 10, 2026, in Des Moines. Distances: Marathon, Half Marathon, 10K.

How many marathons in Iowa have open registration?

All 5 list registration as open as of October 6, 2026.

What is the busiest month for marathons in Iowa?

October 2026, with 4 of the 5. November 2026 follows with 1.

Race planning

Plan your Iowa race

Aid stations, cutoffs and pacing in one free plan. Crew invites and race-day updates come with a Race Pass.

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