Class A First-hand BFRO #12302

Yellowstone backcountry ranger describes sighting, other incidents

BFRO YEAR: 1970s-1980s Mammoth Hot Springs, Park County, Wyoming 1 witness

Account

The witness was riding with horses on a steep hillside above a meadow when the horses became agitated. A deer bolted from the edge of a thicket, followed by a black shaggy biped that ran between dense thickets while angling away. The witness watched it move from thicket to thicket, noting its stocky build, long swinging arms, and furry face.

Summary drafted by AI from the source report and checked by code before I publish it. The witness's own words remain with the publisher — read the original report .

What was reported

Every kind of observation in the account. Select one to find other encounters with it.

Sightings

Described appearance

In the source's own words, field by field. Hover a field's marker to see where it was read.

Height src
like 6 foot, maybe 6' 5"
Build src
stocky
Hair colour src
black
Face src
side of face had a lot of fur
Arms src
long arms
Gait src
running on two feet
Posture src
on two feet
Other features src
black shaggy

Facts & provenance

Each value names where it came from.

Place
Mammoth Hot Springs, Park County, Wyoming
Stated BFRO report #12302 · BFRO report, labelled fields: State, County, Nearest Town, Location Details, Nearest Road
Map point
44.58, -110.50 (± 61 km)
Stated BFRO map layer · BFRO published map layer · read with 85% confidence
BFRO map layer point for report 12302 with published boundary
Account type
First-hand
Stated BFRO report #12302 · BFRO report, “Observed” section
Witnesses
1
Derived BFRO report #12302 · BFRO report, “Observed” section · read with 80% confidence
Figures reported
1
Derived BFRO report #12302 · BFRO report, “Observed” section
Witness was
riding horseback on a trail with horses
Stated BFRO report #12302 · BFRO report, “Observed” section
Witness's word for it
this thing that was running on two feet
Stated BFRO report #12302 · BFRO report, “Observed” section
Source classification
Class A
Stated BFRO report #12302 · BFRO classification label

Source timeline

Every record this entry is built from, earliest known first. Records are versioned and never edited in place.

  1. Published 2005-08-12 Retrieved 2026-09-24 Version 1 Hash dea98d0c98c2
    BFRO - Bigfoot Field Researchers Organization
  2. BFRO map layer Reference
    Retrieved 2026-09-24 Version 1 Hash cfb8a3d423b7
    BFRO - Bigfoot Field Researchers Organization