The Mill Creek Pony Club Horse Trials are held once yearly in May at the Longview Horse Park in Kansas City, Missouri (Area IV), offering Starter through Preliminary levels. Mill Creek Pony Club Horse Trials is traditionally the first event of the year held in Area IV.

A notice to all Mill Creek Pony Club Horse Trials competitors: All horses must have a certificate of veterinary inspection (health certificate), even if the horses are in-state.