You could, but outdoor arenas are often called menages, an indoor arena can be called a indoor school, or an indoor arena.
An indoor riding arena is an indoor area where you can ride horses.
A padock or a arena. I Could easily be wrong.
Trail riding is great fun, equally for horse and rider. As long as your horse is dependable and healthy he will thank you for taking him out on trails. A lot of show horses are routinely taken on trail rides so they don't get bored with riding in an arena.
In the arena
In the summer i train my horse about 5am before i go to school, i like it better in the morning as my horse is always bright awake and he is more forward going he does tend to buck and rear a few times but i it keeps me alert and prepared for anything he tries to do. Also it is calmer your alone in the arena. i also dont have time some evenings with my coursework for exams and my other sports. i do have to train some other horses sometimes as well so i can train mine in the morning and then train the others later in the day.
An indoor riding arena is an indoor area where you can ride horses.
National Indoor Arena is an indoor arena in United Kingdom and was opened on 1991.
It is an 18,000 seat indoor arena...
Podium Arena is an indoor arena in Poland and is is under construction.
Arena Armeec is an indoor arena in Bulgaria and was opened on 2011.
SAP Arena is an indoor arena in Germany and was opened on 2005.
Minsk-Arena is an indoor arena in Belarus and was opened on 2009.
Megasport Arena is an indoor arena in Russia and was opened on 2006.
Atlas Arena is an indoor arena in Poland and was opened on 2009.
Sparkassen-Arena is an indoor arena in Germany and was opened on 1952.
Adriatic Arena is an indoor arena in Italy and was opened on 2001.
Arena Leipzig is an indoor arena in Germany and was opened on 2002.