What are the keys to a good canter departure?

A good canter departure is one of those moments in riding that feels effortless when everything is correct and frustratingly elusive when any element of the preparation, the cue, or the rider's position is off. The departure itself takes a single stride to execute, but the quality of that single stride is determined by everything that happened in the five or six strides that preceded it — the quality of the gait you are departing from, the attention of the horse, the organization of his body, and the clarity and coordination of the aids you apply at the precise moment the departure is asked. The gait you are departing from sets the ceiling for the departure quality. A flat, disorganized, inattentive trot will produce a flat, disorganized canter departure regardless of how correctly the cue is applied. In the strides leading up to the ask, the trot needs to be forward, rhythmic, and alive — not faster, but more energized and more through. The horse should feel light in your hand, responsive to your leg, and carrying himself rather than leaning on either rein or rider leg for support. Inside bend established in the final stride before the departure is the specific preparation detail that makes the correct lead mechanically available. A horse with a correct inside flexion has his inside hind leg positioned to step under his center of mass and initiate the correct lead. The inside rein asks for just enough flexion that you can see the corner of the horse's inside eye — no more, because excessive inside rein tips the horse's shoulder out and defeats the preparation. The cue itself is a coordinated package delivered simultaneously — inside seat bone weighted and slightly forward, outside leg behind the girth to ask the outside hind to initiate the lead, inside leg at the girth to maintain bend and forward energy, outside rein steady to prevent the shoulder from swinging out, inside rein soft and yielding to allow the horse's inside shoulder and inside hind to reach forward freely. Release at the moment of the departure is the element most often overlooked. The moment the horse steps into the canter, soften the hand, follow the new motion with the seat, and allow the horse to find the rhythm of the new gait. A rider who holds the departure cue through the first strides teaches the horse that departing does not produce release. Corner geometry remains the most reliable tool for consistent departures — asking as you come out of a corner uses the natural bend of the turn to load the inside hind and position the horse for the correct lead.