2025-26 Apex Motor Club Challenge Series
TENTATIVE
October 25
Apex Challenge Series Race 1
Apex Motor Club
Arizona
RESCHEDULED
Apex Challenge Series Race 2
Apex Motor Club
Arizona
December 12-13
Apex Challenge Series Race 2 + 3
Apex Motor Club
Arizona
January 10
Apex Challenge Series Race 4
Apex Motor Club
Arizona
February 7
Apex Challenge Series Race 5
Apex Motor Club
Arizona
March 7
Apex Challenge Series Race 6
Apex Motor Club
Arizona
April 10-11
Apex Challenge Series Race 7 & 8
Apex Motor Club
Arizona
Radical Cup North America 2026
1
March 5–8
Sebring International Raceway
USAC
2
April 10–12
Sonoma Raceway
USAC
3
June 18–21
Road America
INDYCAR
4
July 23–25
Michelin Raceway Road Atlanta
USAC
5
August 6–8
Lime Rock Park
USAC
6
September 4–6
Circuit of The Americas
WEC
World Finals
Sep 16–19
WORLD FINALS IN SPAIN
Circuit de Barcelona-Catalunya