Skull Valley overlook, Prescott, Arizona, December 22, 1999 — White lights fade in and merge over empty desert terrain on the winter solstice. Anonymous self-submitted report, uninvestigated.
THINK ABOUTIT UFO|UAP SIGHTING REPORT
1999: Red Light near Prescott
On the night of December 22, 1999 — the winter solstice, under what the witness described as the brightest full moon in over a century — two hikers on Thumb Butte near Prescott, Arizona, witnessed a bright red flash that illuminated miles of forest, followed by a separate observation from the Skull Valley overlook of white lights fading in and out, merging, and departing vertically. The anonymous witness’s companion had reported similar lights on consecutive Friday nights in the preceding months. Subsequent investigation using Bureau of Land Management maps revealed nothing along the bearing line for approximately seventy miles except abandoned U.S. Army mines, reportedly secured with new no-trespassing signs and armed guards. The account is self-submitted, anonymous, and uninvestigated.
⚠ UNCORROBORATED SELF-REPORT — NO INVESTIGATION CONDUCTED ⚠
This account was self-submitted online by an anonymous witness. No investigator has interviewed the witnesses or verified any of the claims, including the reported military presence at the abandoned mines. The account is retained in the archive but should be weighed accordingly.
Date: December 22, 1999
Sighting Time: Not specified (nighttime, after hiking Thumb Butte)
Day/Night: Night
Location: Thumb Butte and Skull Valley overlook, near Prescott, Arizona (Yavapai County)
Urban or Rural: Rural
No. of Entity(‘s): None observed
Entity Type: Not Applicable
Entity Description: Not Applicable
Hynek Classification: NL (Nocturnal Light)
Duration: Red flash: approximately 1 second. White lights: several minutes of observation
No. of Object(s): Two separate events — (1) a single bright red flash; (2) one to three white lights fading in and out, merging, and departing
Description of the Object(s): Event 1: A bright red flash that illuminated the surrounding forest for an estimated 7–8 miles in all directions for approximately one second. No source was identified; only the full moon and a small Cessna (likely from Prescott airport) were visible overhead. Event 2: A single white light fading in and out over approximately 10-second cycles, reappearing laterally from each prior position. Then two lights appeared, throbbing but not fully fading, which moved toward each other, merged into one, and ascended vertically before fading out. The witness’s companion reported having previously seen three lights dancing and forming into one before departing rapidly
Shape of Object(s): Point-source lights only — no structural detail observed
Size of Object(s): Not determinable
Color of Object(s): Event 1: bright red. Event 2: white
Distance to Object(s): Estimated at least 10 miles for the white lights
Height & Speed: Not determinable for Event 1. Event 2 lights merged and ascended vertically before fading
Number of Witnesses: 2 for the December 22 events (anonymous primary witness and a friend). The friend and a third companion reportedly witnessed similar lights on two consecutive Friday nights in preceding months
Special Features/Characteristics: The witness and a friend with Bureau of Land Management access checked maps and found nothing along the bearing line from the Skull Valley overlook to the lights’ location for approximately 70 miles — no towns, no radio towers — except several abandoned U.S. Army mines. The BLM contact reported that the mines had brand-new “U.S. Army property — no trespassing — trespassers will be shot on sight” signs on the barbed-wire fence, placed within the preceding few months, and that he had seen camouflaged men on dirt bikes with shouldered rifles in the area. The friend had previously reported one of the earlier sightings to an unidentified online UFO reporting site, after which a professor from Arizona State University traveled to Prescott and interviewed him, telling him that similar reports had been filed from the Prescott area
Case Status: Insufficient Data
Source: Anonymous self-submitted online report (submission venue not identified)
Summary/Description: On December 22, 1999, two friends hiking Thumb Butte near Prescott under a full moon witnessed a bright red flash that illuminated miles of forest for approximately one second; no source was identified. They then drove to the Skull Valley overlook, where they observed white lights fading in and out, merging, and departing vertically — a pattern the companion reported having seen on two consecutive prior Friday nights. BLM maps showed nothing along the bearing line except abandoned U.S. Army mines, reportedly now guarded by armed personnel. The account is anonymous, self-submitted, and has never been independently investigated.
Related Cases: 1997 Phoenix Lights
Detailed Report
The anonymous witness was home on Christmas break and decided, with a friend, to hike Thumb Butte at night on December 22, 1999. The witness described the night as the winter solstice with a full moon at its closest point to Earth, making it what they believed was the brightest night in approximately 122 years. On the way back down the trail, while the witness was watching their footing over a ditch, a bright red flash lit up the surrounding forest. The witness jerked their head up and saw the flash illuminating the forest for an estimated 7–8 miles ahead, lasting about one second. The friend saw the same flash. When both looked up — the only direction from which the flash could have originated — they saw only the full moon and a small Cessna flying nearby, presumably from the Prescott airport. The witness judged it impossible that the Cessna could have produced a flash powerful enough to illuminate a 15-mile-diameter area.
The red flash reminded the friend of something he and another companion had seen on consecutive Friday nights a few months earlier. The two drove approximately 4–5 miles south to the Skull Valley overlook. After waiting about ten minutes, they observed a single white light fading in and out over approximately 10-second cycles. The light would fade out and reappear laterally from its previous position, repeating the cycle. Then two lights appeared simultaneously, remaining lit but throbbing without fully extinguishing. After a few seconds the two lights moved toward each other, appeared to merge into one, and ascended straight up before fading out permanently. The friend reported that on the prior occasions he had observed three lights dancing around, forming into one, and departing rapidly.
The friend had reported one of the earlier sightings to an online UFO reporting site (unidentified), after which a professor from Arizona State University traveled to Prescott, interviewed him, and told him that similar phenomena had been reported in the Prescott area recently. The witness and friend subsequently obtained Bureau of Land Management maps through a third friend who worked at the BLM. Along the bearing line from the Skull Valley overlook to the lights’ apparent location, the maps showed nothing for approximately 70 miles — no towns, no radio towers — except several sites marked as abandoned U.S. Army mines. The BLM contact reported that he had visited the area near those mines and found brand-new signs on the barbed-wire fencing reading “U.S. Army property, no trespassing. Trespassers will be shot on sight” — no rust, no fading, placed within the preceding few months. He also reported seeing camouflaged men on dirt bikes carrying shouldered rifles.
Researcher’s Notes
The Prescott Lights — Skull Valley 1999 and the Abandoned Mines
- Source Quality: This account is anonymous, self-submitted to an unidentified venue, and has never been investigated by any UFO research organization. The witness does not provide their name, the friend’s name, the BLM contact’s name, or the name of the Arizona State University professor who allegedly conducted an interview. None of these individuals can be identified or contacted for corroboration. The submission venue itself is unknown. These factors make independent verification impossible. The account is retained because the geographic specificity (Thumb Butte, Skull Valley overlook, bearing lines from BLM maps) and the described military-presence details provide enough texture to be worth preserving in the archive, but the Insufficient Data classification reflects the absence of any verified source chain.
- The Red Flash: A flash bright enough to illuminate miles of forest for one second, originating from an overhead direction with no visible source other than the moon and a small Cessna, is a striking claim. Possible mundane candidates include a bolide (bright fireball meteor), which can produce exactly this kind of brief, broad illumination — and December is close to the Geminid meteor shower peak (December 13–14), though ten days past peak. A late Geminid or sporadic fireball remains the cleanest conventional explanation for the red flash. The witness does not describe a streak or trail, which would be expected for a fireball, but a fireball’s terminal burst can appear flash-like and directionless from below.
- The White Lights and the Mines: The white lights’ behavior — fading in and out, repositioning laterally, merging, and departing vertically — could be consistent with military testing or training exercises, which would align with the reported armed presence at the abandoned mines. The Prescott area is within range of several military installations and training areas. If the U.S. Army had reactivated or repurposed abandoned mines in the area (for storage, testing, or classified purposes), the security presence and the unusual lights might share a common source. However, the witness provides no documentation of the signs, the armed personnel, or the BLM maps. Without verification, this thread remains speculative. The Prescott area was also prominently featured in the 1997 Phoenix Lights corridor, establishing a pattern of UAP reports in the region.
- Assessment: The account contains interesting geographic and contextual detail, but every significant claim — the flash, the lights, the ASU professor, the armed guards, the mines — rests on the word of an anonymous, unverified witness. The archive holds the report, notes its limits, and classifies it as Insufficient Data.
The lights over Skull Valley may have been military operations, atmospheric phenomena, or something the archive cannot yet categorize. The anonymous witness who watched them merge and climb has not been heard from since the single report was filed, and the questions they raised about the abandoned mines beneath the Arizona desert remain unanswered.
