El Capitan
El Capitan was a geological formation described as a mountain, located in Yosemite National Park's High Sierras on Earth. There was a record time for free-climbing the mountain.

As a challenge to himself in 2287, James T. Kirk attempted to free climb El Capitan solo, without any safety equipment. It was an attempt which very nearly resulted in Kirk's death after he lost his grip and began to fall. Fortunately, Spock saved the captain's life by using levitation boots to float high enough to catch the captain by his ankle. 

After his rescue, Leonard McCoy berated Kirk for risking his life needlessly. ()

When the  crew received R&R time in 2381, D'Vana Tendi and T'Ana climbed a simulation of El Capitan on the holodeck. ()

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Earth geography