Equestrian Adventure

From Memory Alpha, the free Star Trek reference

Equestrian Adventure, described as "Horse riding in an open country..." was holographic program specifically designed for horseback riding.

In 2365, Captain Jean-Luc Picard ran the program on the USS Enterprise-D during the mission to the Selcundi Drema sector. (TNG: "Pen Pals")

The simulation was also available aboard the USS Enterprise-E in 2373. (Star Trek: First Contact)