When should I sign up for an October Marathon?
As early as you can. 2 of these October Marathon races already have a price increase on the calendar, and 5 are open for entry right now.
Race calendar · October 2026 · Michigan
October 2026 Marathon Races in Michigan
Every Marathon in Michigan in October 2026, all 5 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
5 Marathon races in October 2026
When in October
The October Race Weekends
Marathon races do not spread evenly across October. The busiest weekend is October 3 and October 4, with 2 of them.
By the numbers
The Biggest and Longest-Running
The October Marathon races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
October Marathon Races by City
Soonest Marathon Races in October
5 total Sat, Oct 3, 2026Sleeping Bear Marathon, Half Marathon & 5K Empire, MIFrom $60Details Sat, Oct 3, 2026Trinity Health Probility Ann Arbor Marathon Ann Arbor, MIFrom $62Details Sun, Oct 18, 2026University of Michigan Health-West Grand Rapids Marathon Grand Rapids, MIFrom $50Details Sat, Oct 24, 2026Haunted 5K, 10K, 13.1M & 26.2M at Lansing, MI (43) Lansing, MIFrom $30Register Sun, Oct 25, 2026the overGRound marathon/relay Grand Rapids, MIFreeDetails
Common Questions About Running an October Marathon in Michigan
How much does an October Marathon cost to enter?
The typical entry is $60, with paid entries running from $30 up to $62, and 1 that are free to enter. Entry fees climb as race day gets closer, so the same race is usually cheapest the week it opens.
Marathon Races in Other Months
September and November sit either side of October, which is where most people look next when a date does not fit.