The test event for the 2016 Rio de Janeiro Olympic Games is underway at the Deodoro Olympic Park, where the equestrian events of the Games will be held.

While this week’s test event—a CIC** with 13 riders—is limited to Brazilian horses, a total of 200 equestrian athletes will join 10,300 athletes from 206 National Olympic Committees at the Rio 2016 Olympic Games, which run from Aug. 5-21 next year with 19 days of world-class sport in eventing, dressage and show jumping.

Brazilian photographer Raphael Macek is capturing the test event for the Fédération Equestre Internationale—here are some of his images from the first day…