US - Main Race - California 8 hours - Intercontinental GT Challenge Laguna Seca Raceway 28 October: GTWorld

Scheduled for 28 October 2018 

The Intercontinental GT Series is the first ever global GT3 Series. In 2018 it is formed by the Liqui-Moly Bathurst 12 Hour, Total 24 Hours of Spa, Suzuka 10 Hours and Laguna Seca Raceway California 8 Hours. Both a Manufacturers' and Drivers' title will be awarded in the overall category, together with a title for the best of the Bronze drivers.

WeatherTech Raceway Laguna Seca - Wikipedia

https://en.wikipedia.org/wiki/WeatherTech_Raceway_Laguna_Seca

WeatherTech Raceway Laguna Seca is a paved road racing track in central California used for both auto racing and motorcycle racing, built in 1957 near both ...