Himalayas

The Himalayas were a mountain range on Earth. It contained the Kabul River and had trails that, by the 24th century, were considered to be "ancient".

Federation Starfleet Captain Jean-Luc Picard attempted unsuccessfully in 2367 to convince his first officer, Commander William T. Riker, to attempt a holodeck program of horseriding in the mountains. Riker didn't feel his horsemanship skills were up to the task.