Tie a Quick Release Knot for a Horse
Cross the Rope Back Over the Top
Next, cross the rope back over the top of the snap end of your rope, and pull a loop up through the resulting circle. Do not tighten any of the loops yet. That will make it hard to complete the knot. The final tightening will be at the end.
Pull the Rope Tight
Be sure you're not tying your horse too short or too long. Then pull the rope tight against the post, ring, or twine.
Your horse should be able to move and hold its head in a natural position.you do not want the horse to stand with its head near the ground or have to hold its head up high. The lead rope should not be dangling anywhere near the ground.
If there is any chance that the horse could get a leg over the rope, then it is too long. And, you should tie high enough that you do not need to make the rope short. Ideally, the rope should be chest height or higher, depending on what you are tying it to.
Practice the Quick Release Knot
This diagram shows the quick release knot pattern. Another quick release knot, the bowline knot, is similar, but rather than putting the end of the rope through the rabbit hole, you put the folded loop through so there is a loose end to pull when you are done. To release the knot, simply pull on the loose end. The knot should come undone easily.