Why Do You Mount a Horse From the Left Side? History, Safety, and Modern Best Practices

The common barn rule “Always mount from the left” may seem arbitrary, but it’s been a tradition for equestrians for millennia, since the early days of equine domestication. There are multiple reasons why we prefer the left side, including history, habit, and safety, and it’s also practical for modern riding.  

Nevertheless, mounting from the left side is a standard, not a rule. What matters most is safe technique, a calm horse, and paying attention to comfort signals.  

What Does “Near Side” Mean on a Horse?

When facing the same direction as a horse, handlers refer to the horse’s left side as the “near” side, and the right side as the “off” side. This terminology has been tradition for many years and is commonly used across riding disciplines. 

Why Barn Routines Love Standardization 

Horses learn by patterns, so repeating the same approach and steps can make handling smoother and safer for both horse and rider. 

Mounting the same way each time also helps horse owners notice when something changes, such as unusual fidgeting, pinned ears, or stepping away.  

The Historical Reason People Started Mounting From the Left

Horses were domesticated in part to transport soldiers, so training methods were developed to accommodate riding while wearing or carrying weapons. Riders have mounted on the left side for thousands of years. It was already the norm by the time Xenophon, a Greek military leader and philosopher, wrote his riding manual On Horsemanship c. 380 BCE, instructing riders to mount first on the left side. 

The “Sword on the Left Hip” Explanation  

This method allowed riders to mount easily with a sword fastened on their left side, swinging their right leg over the saddle. Many riders and soldiers were right-handed, so wearing a sword on their left side allowed them to unsheathe it with their right hand. 

How Traditions Become “The Rule” 

This tradition has continued ever since, passed on to each generation from experts and trainers to students in riding academies and lesson programs, even beyond the eras when horses were used in military operations. Horses throughout history, and today, have almost all been trained to accept riders mounting from the left side, so the cycle continues. 

Modern Reasons Mounting From the Left Can Be Safer

Mounting a horse is a precarious moment when horses and humans are most likely to lose their balance, spook, or miscommunicate, so familiarity and technique matters. Here’s how it can help: 

Consistency Helps Horses Stay Calm 

A horse who expects you to approach and mount on their left is less likely to be surprised by movement, pressure on the stirrup, or the leg swing. It will reduce the chances of them shying away, and they’ll be more inclined to stand still for the process. 

The Mounting Block Advantage (Your Horse’s Back Will Thank You) 

While mounting, a rider uses a stirrup to step up with one foot and swing their other leg over the saddle, and may grab the saddle for extra support. This may cause the saddle to twist, putting uneven, uncomfortable pressure on the horse’s back. It can also cause back pain in horses or kissing spine in horses. 

Studies have shown that higher forces and pressure are applied on a horse’s back when a rider mounts from the ground than from a mounting block.  

It’s easier on you and your horse to use a mounting block whenever possible, and it will also reduce wear on your stirrup leathers. 

If Your Horse Objects, Listen 

If your horse suddenly resists mounting, it can be a clue for stress, confusion, tack discomfort, or pain. Your horse might have an injury or kissing spine, your saddle might fit poorly, or there might be another issue that should be addressed. If you have any concerns, talk to your veterinarian. 

Can You Mount a Horse From the Right Side?

Yes, your horse should accept you mounting from either side! The goal is for your horse to stay relaxed and still, no matter which side you use. 

When Right-Side Mounting Makes Sense 

There are always exceptions to the “rule,” which may include: 

• Mounting on uneven ground where only the right side is safe  

• Tight spaces like near a fence or in a trailer area  

• When a rider is injured or has limited mobility  

• If your horse is sore on one side—but your veterinarian approves riding  

Why It’s Worth Teaching Both Sides Safely 

Riding a horse who is “two-sided” can reduce surprises on trails and at events. When training your horse to accept left- and right-side mounting, it’s a good idea to practice at home, mounting slowly and with a helper, in a calm setting.  

How To Mount a Horse Safely (Left or Right Side)

If you don’t yet know how to mount a horse safely, ask an equine expert for help and guidance.  

Quick Pre-Mount Safety Check 

Take a few minutes to check your gear and observe your surroundings before you get started. 

• Gear check: helmet on and proper footwear  

• Tack check: girth, stirrups, and reins are in good working condition  

• Environment check: look for hazards, such as loose dogs, flapping tarps, or slippery footing 

• Horse check: confirm that they’re calm, standing square, and not rushing  

Step-by-Step Mounting Basics 

• Position yourself at your horse’s shoulder, not at their flank  

• Maintain quiet hands and clear rein management  

• Place your foot securely in the stirrup 

• Turn your foot in the stirrup forward, not into your horse’s side 

• Use smooth, controlled movement (no “launching”) 

• Swing your leg up and over your horse’s hindquarters without hitting them 

• Settle gently into the saddle and pause before heading off 

Best Practices for Horse Comfort 

Use a mounting block whenever possible to reduce torque on your horse’s back. Also, be sure to regularly check your saddle fit, and address back soreness early. 

When Mounting Problems Suggest Pain or a Health Issue

With observation, you may notice signs your horse is in pain. If you do, call your veterinarian. 

Red Flags To Take Seriously 

If your horse is normally easygoing yet is now showing any of these red flags, contact your veterinarian. 

• New or escalating “mounting drama,” such as scooting away from you, ear pinning, or tail swishing 

• Back sensitivity, bucking, rearing, or refusing to move forward  

• Trouble being girthed or sudden attitude changes under saddle  

• Lameness or uneven movement  

Who Can Help   

• A veterinarian can rule out pain and medical causes  

• A saddle fitter can evaluate saddle balance and pressure points  

• A trainer can rebuild calm mounting habits with safe handling  

We mount horses on the left side mostly due to tradition and for consistency in training. Use a mounting block whenever possible. Teach your horse to accept mounting from both sides in a safe, secure setting before trying it in other situations. And remember, if mounting suddenly becomes difficult or your horse shows pain signs, contact your veterinarian.  

Mounting a horse can be challenging, but safe practices can help ensure a smooth process that is comfortable for both of you.