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100K Races in Illinois

As of October 22, 2026, Crewable lists 2 upcoming 100K races in Illinois from November 2026 to August 2027. The next is Tunnel Hill 100 on November 14 in Vienna. One advertises prize money.

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

See all Races in Illinois

Race calendar

November 2026

1 race

  1. Tunnel Hill 100

    Vienna, IL1,800 ft gain
    100 mi100K+2Prize money
    Closes Oct 30from $140

August 2027

1 race

Quick answers

What is the next 100K race in Illinois?

Tunnel Hill 100, on Saturday, November 14, 2026, in Vienna. Distances: 100 mi, 100K, 50 mi.

Which 100K races in Illinois offer prize money?

One race advertises prize money.

What is the busiest month for 100K races in Illinois?

November 2026, with 1 of the 2. August 2027 follows with 1.

Cities in Illinois

Chicago51

Neighboring states

Indiana76Iowa33Kentucky50Missouri76Wisconsin57

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