Latest Guide : 2025 Sahlen’s Six Hours of the Glen
Last update: V1.1 Driver updates for GS class #15 and TCR class #31
Welcome to the home of the Official IMSA Spotter Guide for the 2025 season. This page will be active throughout the season.
Each guide will feature all the entries in the IMSA WeatherTech Sports Car Championship and when applicable, the IMSA Michelin Pilot SportsCar Challenge and will be updated during race week, as required.
The Six hours of the Glen takes place in New York State this weekend and the WeatherTech race doubles up as the third round of the Michelin Endurance Cup, bringing a larger grid and the return of Lamborghini to GTP.
Michelin Pilot SportsCar Challenge is main support and also features in this guide.
In addition, Spotter Guide clients, Porsche and Lamborghini are also racing with their one make championships this weekend. Spotter Guides for the Porsche Carrera Cup and Lamborghini Super Trofeo will be available on this website later this week!
If you are attending the race, a printed booklet will be available at the circuit at ‘IMSA Race Stations’ located in the Paddock and Fan Zone.
A season long Spotter Guide t-shirt and poster will also be available from the IMSA Store at the circuit and online at the IMSA Store.
I am extremely fortunate to have a number of liveries racing in IMSA this season Thanks to these teams, sponsors and driver for allowing me to make my hobby a career. These were the cars at Daytona
Thanks to IMSA for partnering with the guide for 2025. If you have found the guide useful, please feel free to thank IMSA on Twitter. Without their support, there would be no guide
Thanks to all the teams who have helped with creating the guide. Special thanks to Shea Adam and Paul Marquardt for their awesome proof-reading skills for this initial guide.
Thank you to the fans, corner workers and media who have continued to support the Spotter Guides over the years. Your support is always appreciated.
If you enjoyed the guides, let IMSA know 😉
 
NOTE: Please feel free to share the guide on Social Media, but PLEASE LINK TO THIS PAGE and not the guide (as file names change with updates) so your friends and fans can download the latest version of the guide! I can also track data easier which in turn helps my quest for sponsorship
Previous rounds
1 Daytona*
2. Sebring*
3. Long Beach
4. Laguna Seca
5. Detroit
6.Mid Ohio (IMPC)
* rounds ofthe Michelin Endurance Cup