Mt. Graham International Observatory

Mt. Graham International Observatory

Leave a review Mt. Graham International Observatory AZ 366 Swift Trail Road to Mt. Graham Mt. Graham International Observatory Photo by Eastern Arizona College Mt. Graham International Observatory Mt. Graham International Observatory Photo by Paul Schulz Mt. Graham International Observatory Photo by R. Arlt Mt. Graham International Observatory Photo by NPR Mt. Graham International Observatory Photo by NPR Mt. Graham International Observatory Photo by R. Arlt

Mt Graham International Observatory houses some of the largest telescopes in the world

map and compass icon

Contact Information

Mt. Graham International Observatory
1480 W. Swift Trail
Safford, AZ 85546

Phone: (928)428-2739
Fax: (928)428-2854
Mt. Graham International Observatory Photo by R. Arlt
Photo by R. Arlt

More about Mt. Graham International Observatory

Astronomy Day trips Tours

The Observatory Base Camp is located on Swift Trail and you will need to check in with the office staff to insure your permits are in order and to "log in" your presence at the observatory. The Base Camp office opens at 7:30 a.m. and closes at 4:00 p.m. Mountain Standard Time, Monday through Friday except for holidays.

Mount Graham International Observatory was conceived in the early 1980s. Two telescopes, the Vatican Advanced Technology Telescope and the Heinrich Hertz Submillimeter Telescope, were dedicated in 1993. The Large Binocular Telescope was dedicated in 2004.

Steward Observatory, the research arm for the Department of Astronomy at the University of Arizona, was founded in 1917. The Observatory operates research facilities at Kitt Peak, Mt. Lemmon, Mt. Hopkins and Mt. Graham, Arizona. The Mt. Graham International Observatory is a component of Stewart Observatory and is the umbrella organization for the research organizations located at the Mt. Graham research site.

The Vatican Advanced Technology Telescope, a joint project of the Vatican Observatory, Vatican City, and Steward Observatory, began scientific observation in September, 1994. The Submillimeter Telescope, a partnership between Max Planck Institute for Radio Astronomy, located in Bonn, Germany, and Steward Observatory, commenced scientific observations in early 1995.

Mt. Graham Observatory is also home to the largest telescope in the world. Large Binocular Telesope (LBT), will provide new and more powerful views of deep space, including potentially answering fundamental questions about the origins of the universe and mysterious worlds in other planetary systems.

Mt. Graham Observatory conducts weekend tours for interested people. With Weather permitting, the tours begin in mid-May and go through mid-November. Because permits are required to enter the endangered red squirrel refugium, advance reservations are required.

The tour features a trip up scenic Mount Graham, focusing on the mountain's rich geology, history, and diversity of life; a lunch near the summit of the mountain; and a guided tour of the observatory facility.

Click for even more information about the Mt. Graham International Observatory.


stars icon

Mt. Graham International Observatory Reviews

Currently there have been no reviews posted for Mt. Graham International Observatory. Be the first to let others know about your experience by clicking the "Leave a review" button above.


Other Astronomy options

Discover Park Photo by J. Gumby Bourret

Discovery Park

Discovery park is a visitors center, a college campus, and an all around unique destination.
Astronomy Bird Watching Day trips Tours

Mt. Graham International Observatory

Let others know about your experience with Mt. Graham International Observatory.
Totally Satisfied
Neither Dissatisfied or Satisfied
Strongly Dissatisfied

Thank you for taking the time to leaving a review.

Note that newly posted reviews take up to 24 hours to show on the website.