As the first practices got underway at Michigan International Speedway, thousands of fans filed into the stands to catch a glimpse of the action.
Thousands more walked the ground surrounding the track, looking at merchandise and checking out the activities.
"It's not all about what's on the track," said MIS Spokesman Brad Kuhbander. "There's so much more to do out here."
Including visiting driver trailers and experiencing the rush of changing a tire in the pit.
"I kept hearing the gun take the lugnuts off and I had to stop in here and take a peek and once I got in here, I realized it was pretty cool," said Jason Muralt, who spent time in the tent, made to look like a race pit.
But for the drivers, the rush comes from driving America's fastest track.
"I love coming here. This track's done very well with myself," said Jimmie Johnson.
Michigan-native Brad Keselowski is still searching for his first win at his home track. He's hoping the support from family and friends attending the race, as well as thousands of local fans will help him get there.
"This would be one of the biggest wins in my career, if not the biggest win of my career," said Keselowski.
The Pure Michigan 400 starts Sunday at 1 p.m.