How big does a round pen have to be train horse?

The size requirements may vary depending on specific training activities, but the following sizes are generally considered appropriate:

For basic beginner sessions:

- Diameter of 18 to 20 feet (5.5 to 6 meters).

For intermediate work as responsiveness and control improve:

- Diameter of 30 feet (9 meters) or larger.

For higher level and liberty training:

- Diameter of 40 to 50 feet (12 to 15 meters) or larger.