Circuit of the Americas launches its 2017 race season this weekend with the Hoosier SCCA Super Tour Southwest Shootout.

The Hoosier Tour is the Sports Car Club of America’s top-level amateur road racing series, and this will be the first time in four years that a premier SCCA amateur series has visited COTA.

More than 450 cars from across the South and Southwest regions, including more than a dozen teams from the Austin area, will be on hand Friday through Sunday, competing in 28 classes and seven race groups.

The cars themselves range from Porsches to Corvettes to Alfa Romeos to open-cockpit machines.

The weekend of racing is free of charge, and fans can park in Lot A nearest to the track’s main entrance. Friday qualifying runs from 1-4:30 p.m. On Saturday, a second round of qualifying starts at 8 a.m., with racing going from 12:30-4:30 p.m. On Sunday, the racing schedule begins at 8:30 a.m. and wraps up about 4:15 p.m.

COTA also will have watch parties Sunday for the Formula One and MotoGP season openers. The Australian Grand Prix will be broadcast on big-screen TVs in the Velocity Lounge on a tape-delay basis from 8-10 a.m. The MotoGP at Qatar will roll at 1 p.m. There is no charge for admission, and concessions will be available for purchase.

Next Tuesday and Wednesday, the track will have two free days of MotoAmerica testing. A 43-rider slate is headed by two-time defending MotoAmerica Superbike champ Cameron Beaubier, his teammate Josh Hayes and the two Yoshimura Suzuki riders, Toni Elias and Roger Hayden.

The testing will feature four 50-minute sessions per class, beginning at 8:30 a.m. Tuesday and ending at 4:30 p.m. Wednesday, along with Q&A sessions for fans.