Starting in 1979, Bennewitz became convinced he was intercepting electronic communications from alien spacecraft and installations outside of Albuquerque. By the 1980s he believed he had discovered an underground base near Dulce. The story spread rapidly within the UFO community and by 1990, UFOlogist John Lear claimed he had independent confirmations of the base's existence. Political scientist Michael Barkun writes that Cold War underground missile installations in the area gave superficial plausibility to the rumors, making the Dulce base story an "attractive legend" within UFOlogy. According to Barkun, claims about experiments on abductees and firefights between aliens and the Delta Force place the Dulce legend "well outside even the most far-fetched reports of secret underground bases."
In popular culture
Dulce base was the subject of an episode of the History Channel program UFO Hunters / Hangar 1 - The UFO Files.
Dulce Base appeared in the comic series The Invisibles, where it housed a secret AIDS vaccine.
Dulce Base and Archuleta Mesa played a major role in the early run of the Outlanders series of novels from Gold Eagle.
In the 2012 video game Ghost Recon: Future Soldier, one of the main protagonists mentions Dulce as containing something that would surprise the Russian government.
The hentai doujin series Dulce Report can be seen as lightly based off the claims of experimentation that were happening to the abducted victims. The surname of Bennewitz was also used.
Dulce Base is described as "the real Area 51" where the US government in collaboration with an evil alien race keeps locked their enemies in the book I Am Number Four: The Rise of Nine, a science fiction novel for young adults. A major battle between aliens takes place later in that scenario.