If you like double the racing fun, the Chevrolet Detroit Belle Isle Grand Prix is the place to be in 2015.

For the third consecutive year, fans will get to see championship points races on Saturday and Sunday during the May 29-31 weekend. It is the only doubleheader on the 17-race IndyCar schedule after Houston dropped out as a host and Toronto opted out of the dual format.

With twice the points at stake, Detroit will be a crucial stop in the championship chase.

"I love the duals. It's a great idea," said 2014 series champion Will Power, who won the Saturday race at Belle Isle this year. "You go there to race. Why waste two days practicing and qualifying when you can race the two days?

"The streets are closed for us, so we should take absolute advantage of that."

The dual format has been a hit in Detroit, drawing more than 110,000 spectators last year, the highest attendance since 2007. Television ratings also were up with the twin format.

Power made a promotional appearance with Penske Racing teammate Helio Castroneves at the downtown headquarters of Quicken Loans, the Grand Prix's presenting sponsor. Castroneves won the Sunday race last season.

The drivers "dual-ed" on tricycles on a makeshift course set up through the aisles of Quicken's main call center.

The Grand Prix comes a week after the Indianapolis 500. And the Belle Isle track, which has been repaved over the last three years, offers a different challenge to the mental torture of racing than the 230-mph run inches from concrete walls around Indy's famed Brickyard.

"Physically, the Detroit street course can be really tiring," Power said. "It's pretty tough to drive these cars now."

Event officials said a United SportsCar Championship race and Speed Energy Formula's Off-Road Truck bash will return in 2015. They hope the World Challenge sedan race will be added as well.

Dual in Detroit

What: 2015 Chevrolet Detroit Belle Isle Grand Prix

When: Friday-Sunday, May 29-31

Where: Raceway at Belle Isle