Field Reports: San Luis Valley Sightings | Modern Explorer
From the Field

Field Reports

Firsthand accounts of haunted trails, lost ruins, cryptid encounters, and the mysteries we uncover on every journey. No speculation—just what we observed.

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Crestone · Summer–Fall 2026
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Lady (Snippy): The World's First Documented Animal Mutilation

September 9, 1967. King Ranch, Alamosa County. A three-year-old Appaloosa mare is found with her head and neck stripped to bone — surgical precision, zero blood, tracks ending 100 feet out. The case became the first formally documented large-animal mutilation in history, and it happened right here in the San Luis Valley. It remains officially unexplained.

By Modern Explorer · May 20257 min read
Lady (Snippy): The World's First Documented Animal Mutilation — San Luis Valley, 1967
Field Report7 min

Lady (Snippy): The World's First Documented Animal Mutilation — San Luis Valley, 1967

On September 9, 1967, a three-year-old Appaloosa mare was found on the King Ranch at the base of the Blanca Massif — head and neck stripped to bone with surgical precision, heart and brain absent, not a drop of blood on the ground. Tracks ended 100 feet from the carcass. A Superior Court judge and his wife reported three reddish-orange rings moving in triangular formation the same evening. No official explanation has ever been issued.

By Modern Explorer · May 2025
Over 1,000 Events Logged: The San Luis Valley's Documented Paranormal Record
Field Report8 min

Over 1,000 Events Logged: The San Luis Valley's Documented Paranormal Record

Author Christopher O'Brien has cataloged more than 1,000 paranormal events in the San Luis Valley since 1992. The UFO Watchtower in Hooper alone has logged over 304 documented sightings. Two sheriff's deputies were followed by an orange sphere. A college student's rear tires blew out as he approached an unidentified object sitting in a field. The CIA has formally documented reports from this region.

By Modern Explorer · Apr 2025
Two Skeptics Near Ute Mountain: The Encounter That Changed Everything (2019)
Field Report6 min

Two Skeptics Near Ute Mountain: The Encounter That Changed Everything (2019)

They went in as skeptics. In 2019, two hunters operating near Ute Mountain just south of the Colorado border encountered two extremely tall hooded figures with oversized heads. Before leaving the area, they came across a 50-to-60-foot structure resembling a circus tent with no reason to exist in that location. 'We're a couple of guys that don't believe in much,' said witness Josh Brinkley. 'But we believe now.'

By Modern Explorer · Mar 2025
Contact on US-160: The Documented Telepathic Encounters of Robert Whitting
Field Report5 min

Contact on US-160: The Documented Telepathic Encounters of Robert Whitting

Alamosa Episcopal minister Robert Whitting was driving US-160 at night when a craft appeared alongside his vehicle and a voice warned him of a dead animal in the road ahead. He found it exactly where described. Whitting went on to report multiple subsequent encounters and began publishing a bi-monthly record of anomalous activity across the San Luis Valley.

By Modern Explorer · Mar 2025
Sasquatch on Blanca Peak: The August 2000 ATV Encounter
Field Report5 min

Sasquatch on Blanca Peak: The August 2000 ATV Encounter

In August 2000, two ATV operators on the Blanca Peaks filed a formal report with the Bigfoot Research Organization describing a close encounter with a large bipedal creature. The Blanca Massif has generated consistent large-creature reports spanning decades — a pattern that remains unaccounted for by wildlife biologists familiar with the region.

By Modern Explorer · Feb 2025
Why the World Comes to Crestone: North America's Most Concentrated Spiritual Hub
Community6 min

Why the World Comes to Crestone: North America's Most Concentrated Spiritual Hub

Crestone is home to more than 20 active spiritual centers representing Buddhist, Hindu, Carmelite, Sufi, and other traditions — all within a few square miles at the foot of the Sangre de Cristo Mountains. The annual Energy Fair draws seekers from across the country. We looked into why this particular valley keeps drawing people searching for something they can't quite name.

By Modern Explorer · Jan 2025
The Vortex of Crestone: What It Is, Why It Draws the World, and What Visitors Experience
Community6 min

The Vortex of Crestone: What It Is, Why It Draws the World, and What Visitors Experience

More than 20 active spiritual centers — Buddhist monasteries, Hindu ashrams, a Carmelite hermitage, Sufi circles, and Native ceremonial sites — within a few square miles at the base of the Sangres. Multiple esoteric traditions locate converging ley lines beneath this valley. Visitors from six continents describe the same thing: something shifts when they arrive. The Vortex of Crestone is not one phenomenon. It is the cumulative weight of centuries of intentional human seeking, concentrated in one place.

By Modern Explorer · May 2026
Wilderness Survival in the Sangre de Cristos: A Field Guide
Skills & Gear8 min

Wilderness Survival in the Sangre de Cristos: A Field Guide

At 14,000 feet, a clear morning becomes a dangerous lightning storm in under an hour. The Sangres are unforgiving: loose scree, false ridges, unmarked drainages, weather that kills without announcement. This field guide covers what actually matters — reading terrain and high-altitude weather, finding shelter and water, navigating without cell service, recognizing altitude sickness before it becomes an emergency, and understanding why conditions above treeline are categorically different from anything below.

By Modern Explorer · Apr 2026
Great Sand Dunes: North America's Tallest Dunes and the Mysteries Surrounding Them
Field Report7 min

Great Sand Dunes: North America's Tallest Dunes and the Mysteries Surrounding Them

At the eastern edge of the San Luis Valley, where the flatlands meet the Sangre de Cristo Mountains, the tallest sand dunes in North America rise 750 feet from an ancient lake bed. They've been here 440,000 years. The Pueblo peoples believed their ancestors emerged from the underworld through openings nearby. The UAP corridor between the dunes and Crestone — 25 miles apart — is one of the most documented in Christopher O'Brien's 30-year database. Most people visiting the dunes don't know Crestone is 30 miles away.

By Modern Explorer · Jun 2026
La Caverna del Oro: The Cave of Gold at 13,000 Feet
Expedition News8 min

La Caverna del Oro: The Cave of Gold at 13,000 Feet

At 13,266 feet, Marble Mountain holds the highest-elevation significant cave in the United States. In 1541 Spanish monks used Native American slave labor to extract gold from within it. Around 1900 explorer Elisha Horn found a skeleton in Spanish armor at the entrance. In 1932 a second skeleton was found chained by the neck to an interior wall. The cave has never been fully surveyed. The gold has never been found.

By Modern Explorer · Feb 2026
Dead Man's Cave: The Spanish Treasure Expedition
Expedition News9 min

Dead Man's Cave: The Spanish Treasure Expedition

October 1880. Three Silver Cliff prospectors crawl through a four-foot opening during a blizzard. Inside: five skeletons — and a second chamber with 400 gold bars stamped with Spanish colonial mint marks. They carry out five bars, assayed at $900 each, and become local celebrities. Then they go back and can't find the cave. Two years of LiDAR research, historical mapping, and rastra location data have pointed us to a specific slope in the Sangres. That slope has no LiDAR coverage. We're going anyway.

By Modern Explorer · Mar 2026
Field Intelligence

SLV Anomaly Field Map

Compiled by Christopher O'Brien (1952–2024)

Over 1,000 documented paranormal events in the greater San Luis Valley region. Hotspots, cattle mutilation sites, UAP corridors, and cryptid encounter zones mapped across three decades of field investigation.

This map represents decades of field research by author and investigator Christopher O'Brien, one of the most dedicated researchers of San Luis Valley phenomena. His work continues to guide researchers and explorers in this region.

Documented Events

Field Report Archive

Reports from NUFORC, BFRO, O'Brien field archives, and MUFON — filtered for the San Luis Valley and surrounding Sangre de Cristos. Toggle categories to filter.

Anomaly Feed
ParanormalSep 7, 2024
Saguache, CO38.09°N 106.14°W

Resident reported cattle acting erratically for 3 days preceding discovery of a 28-foot flattened circle in adjacent alfalfa field. No mechanical equipment access. Plants were bent, not broken. Filed with NUFORC and MUFON.

SRC: NUFORC / MUFON · hover to expand
UAP/UFOMar 15, 2024
Hooper, CO37.76°N 106.03°W

Amber sphere observed hovering over irrigated fields east of the UFO Watchtower for 12 minutes. Photographed by two witnesses. Object descended to approximately 200 feet altitude then vanished without accelerating.

SRC: NUFORC · hover to expand
MutilationFeb 28, 2023
Alamosa County, CO37.51°N 105.72°W

Rancher discovered bovine with precision incisions to jaw, left ear, and rectum. No tracks, no blood, no signs of predator activity. Sheriff's office responded. Case documented by county animal control.

SRC: NUFORC · hover to expand
UAP/UFOJun 11, 2022
Crestone, CO37.99°N 105.69°W

Three residents in separate locations independently reported the same large green fireball descending over the Sangre de Cristos at 11:47 PM. Object appeared to decelerate before disappearing behind the ridge. No meteor shower active.

SRC: NUFORC · hover to expand
UAP/UFOAug 22, 2021
Del Norte, CO37.68°N 106.35°W

Retired sheriff's deputy reported a rapidly moving light that executed a 90-degree turn at speed estimated in excess of Mach 3 based on angular velocity. No sonic boom. Object disappeared in the direction of Blanca Peak.

SRC: NUFORC · hover to expand
CryptidSep 1, 2019
Near Ute Mountain, CO37.35°N 105.35°W

Two hunters encountered two extremely tall hooded figures with oversized heads at close range. Before departing the area, witnesses also found a 50–60 foot structure of unknown origin in the wilderness. "We're a couple of guys that don't believe in much. But we believe now."

SRC: BFRO · hover to expand
UAP/UFOApr 17, 2019
Alamosa, CO37.47°N 105.87°W

Two witnesses observed a bright orange sphere follow their vehicle for approximately 1.4 miles along Highway 160. Object matched vehicle speed before stopping and hovering. Mirrors the pattern of a 1994 documented encounter in the same corridor.

SRC: NUFORC · hover to expand
UAP/UFOJul 4, 2018
Hooper, CO37.76°N 106.03°W

UFO Watchtower on-site report: triangular craft with lights at each vertex traversed from north to south in approximately 6 seconds. Estimated size larger than commercial aircraft. Logged as one of 304+ documented sightings at this location.

SRC: NUFORC / UFO Watchtower Log · hover to expand
ParanormalOct 29, 2016
Baca Grande, CO37.95°N 105.65°W

Property owner reported unusual electromagnetic interference — watches stopping, vehicle electronics malfunctioning — along with strong infrasound sensations and two nights of anomalous amber lights on the adjacent ridge.

SRC: O'Brien Field Archives · hover to expand
UAP/UFOMar 9, 2014
Saguache, CO38.09°N 106.14°W

Multiple residents reported a hovering white light that changed from white to amber to red before disappearing. Estimated altitude 500–800 feet. No aircraft in FAA records for the area at that time.

SRC: NUFORC · hover to expand
CryptidJun 3, 2010
Sangre de Cristo Range, CO38.10°N 105.60°W

Backpacker at 11,200 feet elevation reported large bipedal figure crossing open talus field above treeline. Observed for approximately 90 seconds through binoculars at 200-yard distance. Filed with BFRO.

SRC: BFRO · hover to expand
UAP/UFOSep 14, 2008· Disc
Monte Vista, CO37.58°N 106.15°W

Disc-shaped craft with pulsing white perimeter lights observed hovering for approximately 8 minutes before accelerating vertically at extreme speed. No sound reported. Three independent witnesses.

SRC: NUFORC · hover to expand
MutilationJul 15, 2002
San Luis Valley, CO37.80°N 105.95°W

Cattle mutilation documented by field investigator Christopher O'Brien. Classic presentation: surgical incisions, bloodless, selective organ removal. Third documented case in county in 18 months.

SRC: O'Brien Field Archives · hover to expand
CryptidAug 1, 2000
Blanca Peak, CO37.57°N 105.49°W

Two ATV operators encountered a large bipedal creature on the Blanca Massif. Filed formal report with the Bigfoot Field Researchers Organization. Described as very large, moving on two legs, covered in dark hair. BFRO investigation confirmed credible witnesses.

SRC: BFRO · hover to expand
UAP/UFODec 9, 1998· Oval
Alamosa, CO37.47°N 105.87°W

Police officer on routine northbound patrol observed oval-shaped object with no sound. Filed formal report with agency. Submitted to NUFORC.

SRC: NUFORC · hover to expand
UAP/UFOFeb 13, 1998· Light
Crestone, CO37.99°N 105.69°W

Large amber light observed at the top of the Sangre de Cristo range, approximately 10,000 feet elevation. Stationary for several minutes then moved laterally before disappearing.

SRC: NUFORC · hover to expand
UAP/UFOJun 20, 1997· Light
West of Alamosa, CO37.47°N 106.10°W

Bright silverish-white light 5 degrees above horizon with occasional red flashes, observed approximately 50 miles northwest of Alamosa for 20+ minutes. No conventional aircraft explanation.

SRC: NUFORC · hover to expand
UAP/UFOSep 3, 1967· Fireball
Near Crestone, CO37.99°N 105.69°W

Three house-sized balls of fire descended vertically then accelerated horizontally, covering an estimated 40 miles in 3–4 seconds. Multiple witnesses in adjacent counties corroborated.

SRC: NUFORC · hover to expand
MutilationSep 9, 1967
King Ranch, near Alamosa, CO37.47°N 105.87°W

Appaloosa mare Lady (Snippy) found with head and neck stripped to bone with surgical precision. Zero blood at scene. Tracks ended 100 feet from carcass. A Superior Court judge and wife reported three reddish-orange rings in triangular formation the same evening. First formally documented large-animal mutilation in history.

SRC: Historical Record / NUFORC · hover to expand

NUFORC · BFRO · O'Brien Field Archives · MUFON
Unverified witness accounts. Coordinates approximate.

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