Diamond Mountain is a Tibetan Buddhist seminary and retreat center located south of Bowie, Arizona in the Chihuahuan Desert. Oriented towards the Gelugpa school, it was founded by Geshe Michael Roach in 2000 and opened to students in September 2004. It is not an accredited university. The 1,000-acre (4.0 km2) site was purchased in October 2001 and was formerly known as "Bear Springs Ranch".
The first Tibetan Buddhist lama to have American students was Geshe Ngawang Wangyal, a Kalmyk-Mongolian of the Gelug lineage, who came to the United States in 1955 and founded the "Lamaist Buddhist Monastery of America" in New Jersey in 1958.
Among his students were the future western scholars Robert Thurman, Jeffrey Hopkins, Alexander Berzin and Anne C. Klein.
Other early arrivals included Dezhung Rinpoche, a Sakya lama who settled in Seattle, in 1960, and Tarthang .