100K Races in Wisconsin
As of October 22, 2026, Crewable lists 2 upcoming 100K races in Wisconsin from October 2026 to July 2027. The next is Among the Trees on October 31 in Dousman. Registration is open for 1.
Sources: UltraSignup, RunSignUp, UTMB, race organizers and race websites
Race calendar
October 2026
1 raceJuly 2027
1 raceQuick answers
What is the next 100K race in Wisconsin?
Among the Trees, on Saturday, October 31, 2026, in Dousman. Distances: 100K, 50K.
How many 100K races in Wisconsin have open registration?
1 of the 2 list registration as open as of October 22, 2026, including Among the Trees.
What is the busiest month for 100K races in Wisconsin?
October 2026, with 1 of the 2. July 2027 follows with 1.
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