Half dome yosemite

Discover Half Dome, the iconic granite monolith in Yosemite National Park, with its striking vertical faces and rich geological history.

About this subject

Half Dome is one of the most iconic rock formations in Yosemite National Park, California, USA. Standing at 2,694 meters (8,839 feet) above sea level, it rises about 1,450 meters (4,800 feet) above the Yosemite Valley. Its distinctive split-dome shape is the result of millions of years of glacial erosion and weathering. The granite that composes Half Dome is a type of granodiorite, formed about 87 million years ago during the Cretaceous Period when magma cooled slowly beneath the Earth's surface. Glaciers that covered the region during ice ages sculpted its vertical and flattened faces, creating the unique profile.

Climbing Half Dome is a legendary challenge. The most famous route is the Regular Northwest Face, a technical rock climb of 22 pitches, rated 5.9 (YDS scale). For non-climbers, there is a hiking trail that leads to the summit, with the final section using fixed cables installed in 1919. The hike is about 27 kilometers (17 miles) round trip with an elevation gain of 1,460 meters (4,800 feet), and requires a permit from May to October. Over 50,000 people reach the top annually.

Culturally, Half Dome holds spiritual significance for the Native American Ahwahneechee people who inhabited the valley. Legend says the monolith represents the petrified face of a guardian. In the 19th century, geologist Josiah Whitney named it Half Dome due to its appearance from the valley, though geologically it was never a complete dome, the name reflects only the view. The site also inspired naturalists like John Muir, who wrote about the sublime beauty of the granite mountains.

Fun facts: Half Dome is home to species such as the golden-mantled ground squirrel and the golden eagle. The rock is so hard that it imperceptibly expands and contracts with temperature changes. In 2023, the park received 3.8 million visitors, and Half Dome remains one of the most photographed natural landmarks in the world.

Frequently Asked Questions

How tall is Half Dome?

Half Dome stands at 2,694 meters (8,839 feet) above sea level and rises about 1,450 meters (4,800 feet) above Yosemite Valley.

Is it difficult to climb Half Dome?

The technical climb via the Regular Northwest Face is challenging, rated 5.9. The cable hike is strenuous, requiring good fitness and a seasonal permit.

What is the origin of the name Half Dome?

Geologist Josiah Whitney named it in the 19th century for its half-dome appearance from the valley, though geologically it was never a complete dome.