About Mount Wilson Observatory & the Mount Wilson Institute

Located on Mount Wilson, a 5,710-foot peak in the San Gabriel Mountains near Pasadena, California, the Observatory was conceived and founded by George Ellery Hale in 1904. The home of some of the most important telescopes in the development of modern astronomy – including the two largest telescopes of their time – it is a site of significant scientific and Los Angeles history.

Today, Mount Wilson serves as a historic, educational, and cultural landmark. Visitors can explore its storied grounds, attend public lectures, concerts, and films, enjoy art exhibitions and educational programs, and experience stargazing through its legendary telescopes. The Observatory connects people with science, history, and the cosmos in a truly unforgettable mountain setting.

All proceeds from programs and ticketed events support the Mount Wilson Institute’s mission to preserve, protect, and promote the Observatory, ensuring its history, telescopes, and legacy remain accessible and inspiring for generations to come.

Learn More:

Our History

Tracing the origins and evolution of Mount Wilson Observatory, from its founding in 1904 by George Ellery Hale to its role as the site of groundbreaking discoveries that reshaped our understanding of the universe.

Reflections Newsletter

Reflections is Mount Wilson Observatory’s biannual newsletter, offering stories from the mountain, updates on our programs and events, and insights into the science and history that continue to inspire us today.

Annual Reports

The Mount Wilson Institute’s Annual Reports provide a transparent account of our work each year, detailing our programs, finances, preservation projects, and the collective efforts that ensure this historic observatory continues to inspire future generations.

Contact Us

Want to plan a visit, schedule a private tour, or learn more about our programs? We’re happy to help you connect with the right person on the mountain.