Which of the following is a timed rodeo event?

Calf roping is considered a timed rodeo event because it involves a contestant performing a specific series of actions within a set period, aiming to achieve the fastest time. In calf roping, the cowboy must ride their horse to catch a calf with a lasso, then dismount, run to the calf, and tie three of its legs together. The clock stops when the calf is secured, making speed crucial to winning.

In contrast, some of the other events, like bull riding and saddle bronc riding, are judged based on the rider's ability to stay on for a specific duration, rather than competing against the clock. Barrel racing, although it is a timed event for riders, can sometimes be included in discussions about rough stock events, which involves the performance style rather than traditional timed competition.

Therefore, calf roping stands out as a clear, focused example of a timed event within rodeo competitions.