Building an indoor riding arena is one of the most exciting investments you can make for your farm. It is also one of the largest capital expenses you will ever face. When you are planning a steel building for year round riding, getting the dimensions right before you pour concrete is critical. You cannot simply add a few feet later if you realize your space is too tight.
Steel riding arenas are the gold standard for indoor arenas because of their clear span engineering. This means you do not need any interior support columns to hold up the roof. You get wide open space from wall to wall. But exactly how much space do you actually need?
That depends entirely on what you plan to do inside. Let us break down the ideal arena sizes for different riding disciplines so you can build exactly what you need.
The Basic Multipurpose Arena
If you run a casual boarding barn or focus on beginner lessons, you might not need a massive footprint. A very common entry level size is 60 feet wide by 120 feet long.
This size gives you enough room to safely exercise a few horses at a time. You can set up a simple ground pole grid or practice basic flatwork. However, a 60 foot width will start to feel very cramped if you have multiple horses cantering at once. If your budget allows, upgrading to a 70 foot width by 140 foot length is highly recommended for a general purpose facility. This small increase makes passing much safer and gives green horses more room to balance through the corners.
Dressage Requirements
Dressage riders have very specific geometric requirements. If you plan to host clinics, ride through standard tests, or train seriously for competition, you have to build to exact specifications.
There are two standard dressage court sizes. The small arena is 20 by 40 meters, which translates to roughly 66 by 132 feet. The standard or large arena is 20 by 60 meters, which is about 66 feet wide by 197 feet long.
When sizing your steel building for dressage, you must account for the space outside the perimeter rail. You will want at least five feet of buffer space between your dressage letters and the structural walls of your building. Therefore, an absolute minimum building size for a standard dressage court would be 80 feet wide by 210 feet long.
Hunters and Jumpers
Jumping requires significant space for setting related distances and allowing horses to safely organize their strides. A 60 foot wide arena is entirely inadequate for a jumper barn. You will simply not have enough room to build standard courses or tight rollback turns.
For hunters and jumpers, you should aim for a minimum width of 80 feet. A width of 100 feet is ideal and incredibly common in modern show barns. For length, 200 feet gives you enough room for proper lines.
Width and length are only part of the equation for jumping. You also have to consider eave height. A horse clearing a large oxer at the edge of the ring needs plenty of overhead clearance. If your ceiling is too low, it creates a claustrophobic effect and can actually be dangerous. You will want a minimum eave height of 16 to 18 feet for a jumping arena.
Western Disciplines
Western riding styles like reining and cutting require their own unique footprints. Reining horses need a long stretch of straightaway to build speed for sliding stops. A standard reining pattern eats up a lot of ground quickly.
For reining, length is your best friend. A building that is 100 feet wide by 250 feet long is a fantastic setup. The width gives you plenty of room for large fast circles, while the impressive length allows the horse to fully extend down the rail.
Cutting and cow horse events also require width. You need room to work cattle safely without pinning them too quickly against the arena walls. A 100 foot width should be considered the minimum standard for serious cattle work indoors.
Planning Your Future
When you sit down to finalize your building plans, think about what your facility might look like in ten years. You might ride western pleasure today, but what if you decide to take up jumping or host regional clinics down the road?
It is always cheaper to build slightly larger now than to realize you are boxed in later. A clear span steel building offers incredible versatility, so give yourself the square footage to grow. Sit down with a tape measure in your current outdoor ring. Set up cones to simulate your proposed indoor dimensions. Ride your normal routines within those cones and see how it feels.
Taking the time to size your arena specifically for your discipline ensures that your new facility will be a joy to ride in every single day.
