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100K Races in Tennessee

As of October 6, 2026, Crewable lists 7 upcoming 100K races in Tennessee from October 2026 to June 2027. The next is Chattanooga Mountains Stage Race on October 16 in Chattanooga. Registration is open for 1.

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

Race calendar

October 2026

2 races

November 2026

2 races

  1. Mamba 100

    Memphis, TN
    100 mi100K
    Closes Nov 2from $100

March 2027

1 race

  1. Viper 100

    Cordova, TN
    100 mi107K
    Closes Nov 2from $100

April 2027

1 race

June 2027

1 race

Quick answers

What is the next 100K race in Tennessee?

Chattanooga Mountains Stage Race, on Friday, October 16, 2026, in Chattanooga. Distances: 60 mi.

How many 100K races in Tennessee have open registration?

1 of the 7 list registration as open as of October 6, 2026, including Ultra Trail Chattanooga by UTMB.

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

October 2026, with 2 of the 7. November 2026 follows with 2.

Cities in Tennessee

Chattanooga5Knoxville50Nashville49

Neighboring states

Alabama111Arkansas71Georgia200Kentucky71Mississippi29Missouri104North Carolina201Virginia6

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