Challenge of the Americas!
The West's Premier National Karting Series
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2025 Schedule
January 31-February 2, 2025 Musselman Honda Circuit, Tucson, AZ.
Tucson 2025 Event Info
March 7-9, 2025 K1 Circuit, Winchester, CA.
K1 Circuit 2025 Event Info
April 25-27, 2025 Sonoma Raceway, Sonoma, CA.
2025 Sonoma Event Info
Registration
June 13-15, 2025 Utah Motorsports Campus, Grantsville, UT.
2025 Utah Event Info
Registration
Classes
Rules
NKA Rule Book
2024 NKA Supplemental (Updated 1.31.2025)
Supplemental Regulations V2024.1
Event Format
Pre-Tech and Declaration Procedures
2025 Fuel and Oil
Points Structure
Media
Digital Magazine
Happy Hour With Howden 11/24/2020
Results
Results CoTa
Points After Sonoma
Champions
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Series Points
2025 Series Points
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