equestrian event
Refers to competitive horse-riding disciplines such as dressage, show jumping, and eventing, typically in sports contexts.
The equestrian events at the Olympics are beautiful, with horse and rider in perfect harmony.
乗馬 is general horseback riding, while 馬術競技 specifically refers to competitive equestrian sports.
Compound of 馬術 (equestrian skill) and 競技 (competition).