The Tire Rack Ultimate Track Car Challenge, our annual no-holds-barred track competition, simply seeks the fastest machines on four wheels. 

The rules are brief: Car and driver must just pass a safety inspection. Period.

Run any tire and any suspension type, add seven turbos plus two superchargers, and re-engineer the chassis to your heart’s content. Concentrate on speed, not excuses.

The Tire Rack Ultimate Track Car Challenge Presented by Grassroots Motorsports,the home of the fastest time trial cars in the country for more than a decade, joins the Tire Rack SCCA Time Trials Nationals Powered by Hagerty.

Who’s welcome? Everyone, pretty much. New, old, factory-bought and home-built. Wings are cool. So are box flares, giant intercoolers and sequential shifters.

This is also a great chance for shops to show off their work–or settle a grudge with another outfit. Awards go deep into the field, too, meaning lots of hardware to hand out.

Pro cars are invited, too. What's faster: a World Challenge car or a Trans Am titan? Let's find out. 

The Tire Rack Ultimate Track Car Challenge is presented by:

And Fueled By:

In Association With:

With Trophies From:

Details

When:
September 18-21, 2025

Where:
SCCA Time Trials Nationals
Pitt Race
201 Penndale Road
Wampum, PA 16157

Schedule:
View the official event schedule on the SCCA’s website.

Editorial Coverage

The Tire Rack Ultimate Track Car Challenge is the cover story of an issue of Grassroots Motorsports. Every car that posts an official time at the Ultimate Track Car Challenge while showing all required sponsor decals is guaranteed coverage in the magazine, with entries that do well or have compelling stories eligible for additional editorial features at the magazine editors’ discretion.