Half dome yosemite

Half Dome is a striking granite monolith in Yosemite National Park, California, famous for its distinctive shape and iconic climb.

About this subject

Half Dome is a granite monolith in Yosemite National Park, California, United States. Rising to 2,694 meters, it towers about 1,450 meters above Yosemite Valley. Its sheer northwest face is one of the most challenging climbing destinations in the world. The rock is composed mainly of Cretaceous granite, formed about 87 million years ago by magma intrusion and later sculpted by glacial erosion.

Named "Half Dome" by geologist Josiah Whitney in 1865, Native Americans called it Tis-sa-ack, meaning "face of a maiden," based on a legend of two women turned to stone. The most common route to the summit is the Cable Route, with steel cables installed since 1919 to assist hikers. About 50,000 people attempt this hike annually, with a success rate near 75%.

Beyond geology, Half Dome is a cultural icon in the United States, appearing in corporate logos, films (such as "The Rock" and "Star Trek V: The Final Frontier"), and in Ansel Adams's photography. It also marks a milestone in climbing: the first ascent of the Regular Northwest Face in 1957 was considered one of the hardest climbs of its era, using pitons and nylon ropes. Today, the National Park Service restricts summit camping and requires permits and training for the ascent.

Despite its name, Half Dome is not actually half a dome; the name comes from its domal shape that appears sliced in half. Geological studies show its vertical face results from exfoliation joints, where granite sheets peel away, similar to El Capitan. Glacial erosion also polished the surface, leaving visible striations at its base.

Frequently Asked Questions

How tall is Half Dome?

Half Dome has an elevation of 2,694 meters, rising about 1,450 meters above Yosemite Valley.

Do I need climbing experience to hike Half Dome?

The most common route (Cable Route) does not require technical climbing, but it demands good physical fitness and preparation for using the steel cables. A permit is required, and sometimes a mandatory training session.

How many people attempt Half Dome each year?

Approximately 50,000 people attempt it annually, with a success rate of about 75%. Permits are limited to protect the environment and the experience.