The Solar Lodge of the Ordo Templi Orientis was a secret society in California that was established in 1965, and withdrew from initiatory activity in 1972. It was loosely based on ideas from the then-defunct Ordo Templi Orientis, but used the curriculum of the A.'.A.'. established by Aleister Crowley.
The precursor to Solar Lodge was set in motion by Ray Burlingame ("Frater Aquarius"), when he initiated Georgina "Jean" Brayton ("Soror Capricornus") in 1962. Burlingame was a Ninth Degree member of Ordo Templi Orientis. The O.T.O. as re-founded by Grady McMurtry in 1969 has never accepted Solar Lodge as a valid body of O.T.O. and considers the Solar Lodge "clandestine", much as Freemasons consider the O.T.O. a form of clandestine Masonry.
In 1965, shortly before his death, Burlingame instructed Brayton to initiate other people, which she did, expanding Solar Lodge in the 1960s to include over 50 members. By 1967, the Lodge owned several small mansions, a gas station, a bookstore, all in Los Angeles, and a desert property known as Solar Ranch in the Sonoran desert.