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2013 · Secret Mountain, Bradshaw Ranch, Boynton and Hartwell Canyons, Palatki and Clarkdale; Coconino and Yavapai Counties, Arizona

Secret Mountain: armed guards, helicopters and an alleged tunnel under the red rocks (Sedona, Arizona)

Sourced, unconfirmed
Strength D · 3/10
Evidence 1/4 · Witnesses 2/3 · Backing 0/3

Several named firsthand witnesses and an independent second group at the same mountain; the radar scan is unreleased and the on-camera cavity is shallow.

Plausibility Moderate
Score 8 · 7 factors for, 0 against

Two named local researchers over twelve years, plus Greer's separate group meeting an armed man at the same mountain. Secrecy would hide a facility by design, so the missing official record is not counted. The tunnel rests on an unreleased scan.

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Unresolved
Secret Mountain above the Sedona canyons at dusk: fences in strange places, and military helicopters over the red rock. · Illustration for uaptrail.com
When2013 – 2026 (ongoing)
WhereSecret Mountain, Bradshaw Ranch, Boynton and Hartwell Canyons, Palatki and Clarkdale; Coconino and Yavapai Counties, Arizona

Locals around Sedona have said for decades that a military facility sits under Secret Mountain, the mesa northwest of town. Two local researchers, Jeremiah Horstman and Alexandra Caldwell, describe twelve years of fenced 'empty' canyons, armed men in Forest Service-style uniforms, shots fired at them in Boynton Canyon after a metallic boom like a bunker door, and nightly helicopter formations that follow balls of light. They say a drone radar survey by Brandon Fugal's team found a 50 ft tunnel heading toward the mountain, though the scan has not been released. Steven Greer's group, separately, met a man with a drawn pistol at the back of the same mountain in 2026.

How plausible · Moderate

Two named local researchers over twelve years, plus Greer's separate group meeting an armed man at the same mountain. Secrecy would hide a facility by design, so the missing official record is not counted. The tunnel rests on an unreleased scan.

  • ●●
    Access They were in the canyons themselves.
  • ●○
    Cost of speaking Named on national television.
  • ●○
    No gain sought Nothing evident sold.
  • ●○
    Consistent over time Reports over about 12 years.
  • ●○
    Checkable details check out Fences, sites and the SEGA garden can be visited; the radar scan is unreleased.
  • ●○
    Physical traces or official reaction On-camera GPR cavity and helicopter footage.

Plausibility weighs how well an account fits where secrecy hides the documents by design, so missing records never count against it. Strength measures what is documented. Assessed 2026-10-28.

Claims

Over about 12 years in the canyons below Secret Mountain, local researchers Jeremiah Horstman and Alexandra Caldwell met fences in 'strange places' and armed men, one wearing a DoD lanyard; at Palatki a man in a Forest Service-style uniform with body armour, a hidden pistol and an unusual radio tracked them to the foot of a cliff.firsthandSourced, unconfirmedJeremiah Horstman and Alexandra Caldwell (NewsNation, 2025)
In trailless country at the back of Boynton Canyon they heard voices, then a hollow metallic boom like a bunker door closing, then shots fired at them.firsthandSourced, unconfirmedHorstman and Caldwell
During the COVID closure Apache helicopters with full rocket pods flew into Boynton Canyon and an explosion was heard at its end; Horstman later found and filmed a fresh rockslide at the spot and glimpsed someone in black running.secondhandSourced, unconfirmedan unnamed worker at the head of the canyon, via Horstman; the rockslide is Horstman's own (firsthand)
Caldwell saw seven Apache helicopters escorting a disc over West Sedona at about 10 a.m.firsthandSourced, unconfirmedAlexandra Caldwell
Through night vision from Bill Gray Road they counted 17 Blackhawks over Woodchute Mountain; an amber ball of light rose from below and two helicopters broke off to follow it over the mountain. A local woman, Melinda, says she sees this almost every night.firsthandSourced, unconfirmedHorstman, Caldwell and a local witness
Near Griffith Springs, Flagstaff, both saw a structured craft close enough to 'throw a tennis ball at', with no downwash on the trees.firsthandSourced, unconfirmedHorstman and Caldwell

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People and organizations

Northrop Grumman orgRoss Coulthart personSteven Greer person

Sources

Heard in (1)

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