This Once Upon A Time fan art contains
horse trail.
There might also be
horse wrangler, wrangler, lippizan, lipizzan, lippizaner, saddle horse, riding horse, and mount.
Merlin (Elliott Knight), David (Josh Dallas), Hook (Colin O'Donoghue) and Belle (Emilie de Ravin) sneak into the dungeon at Arthur's castle to free Merida and Lancelot. #OnceUponATime