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> RECORD OBS-0145 | status: DEBUNKED | filed 2026-07-31
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Dulce Base Underground Alien Facility

RecordOBS-0145
CategoryExtraterrestrial/UFOs
StatusDEBUNKED
SummaryThe Dulce Base conspiracy theory claims that a secret underground facility exists beneath Archuleta Mesa near Dulce, New Mexico, jointly operated by humans and extraterrestrial aliens. Proponents allege the base houses advanced technologies, human-alien hybrids, and has been the site of conflicts between aliens and military forces. The theory originated in the late 1970s with claims by Paul Bennewitz and was popularized by UFOlogists and tabloid media.
OriginThe theory emerged in the late 1970s and early 1980s, primarily from Paul Bennewitz, an Albuquerque businessman who claimed to intercept alien communications and discovered the base. It gained wider attention through UFOlogist John Lear in 1987 and tabloid coverage in 1988.
Claimed
  • A seven-story underground base exists under Archuleta Mesa near Dulce, New Mexico.
  • The base is jointly operated by humans and extraterrestrial aliens, including grey aliens.
  • The base houses advanced technologies, human-animal hybrids, and human-alien hybrids.
  • There have been violent conflicts between aliens and human military forces, such as Delta Force, resulting in casualties.
  • Cattle mutilations in the area are linked to alien experiments, including the implantation of alien fetuses in cows.
  • UFO sightings and strange lights have been reported by residents and former police officers in the area.
Evidence / consensusThere is no credible evidence for the existence of an underground alien base at Dulce. The claims are based on unverified personal testimonies, some of which were later admitted to be fabrications. The U.S. government has no official records confirming such a facility, and experts consider the theory a modern legend influenced by Cold War-era underground installations and earlier science fiction.
> OBSERVER NOTE:
File notes: origin traced to Paul Bennewitz's unsubstantiated electronic intercepts; key promoter John Lear later recanted; tabloid source Leonard Stringfield disavowed the story. No physical evidence, no corroborated witnesses, no declassified documents. Classified as folklore with a Cold War substrate.

Sources

  1. Dulce Base - Wikipedia
  2. Allegedly, There Is a Secret Underground Alien Base in Dulce, New Mexico | Discovery

Sources are external and provided for verification. Listing does not imply the Observer endorses their claims.