WeatherTech International Challenge with Brian Redman

Masters F1 historic racing features at the WeatherTech International challenge with Brian Redman at Road America
Photo | Masters Historic Racing USA

A mid-summer tradition, the WeatherTech International Challenge with Brian Redman at Road America is one of the largest vintage racing events in the United States.

The WeatherTech® International Challenge road race features over 400 vintage and historic racecars competing across several days. The highlight of the 2023 event at Road America is the Kastner Cup featuring Triumph sports cars.  This will be the 21st running of the Kastner Cup race and will celebrate the 70th year of Triumph sports car in competition.

Additionally, some of the the spectacular Masters Historic Racing USA series have been invited to join existing run groups at the magnificent Elkhart Lake circuit.


  • Masters Racing Legends for 1966-1985 Formula One Cars
  • Masters Formula Atlantic Plus
  • Masters Endurance Legends USA
  • Historic Trans Am
  • Kastner Cup for Triumph Sports Cars
  • Ferrari Feature Corral

The WeatherTech International Challenge is a premier vintage gathering featuring everything from a special Concours d’Elegance on Friday and Saturday along the streets of Elkhart Lake, and competitive racing through the weekend.


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