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31 encounters
October 1980 Gardiner, Park County, Wyoming Class B #26521

Memory told of heavy, bipedal running heard while camping in Yellowstone National Park

In the winter of 1980 the witness and a relative camped overnight in a tent in Yellowstone after hiking and fishing. Around 10 at night while inside the tent they heard and felt something large and heavy run past on two legs for about ten seconds. They remained inside terrified until daybreak and found no tracks in the morning.

Footsteps
May 1978 About 30 Minutes East Of The East Gate To Yellowstone NP, Park County, Wyoming Class A #1241

Two gov't geologists witness hominoid creature cross road about 30 min. east of Yellowstone Park's East Gate

Two geologists driving at night toward Yellowstone saw a large upright shaggy figure in their high beams as it climbed from a roadside ditch. The figure glanced at the vehicle, then crossed the highway in a few long strides, grasped the guardrail, and descended into a culvert out of sight. The witnesses stopped briefly then drove on to the park entrance, waiting until morning to compare independent written accounts.

Full-body sightingRoad crossingEyeshine
April 1972 Lost Creek Wilderness Area, Park County, Colorado Class A #1370

Hikers observe animal crouched next to a pond in the Lost Creek Wilderness Area.

The witness and a companion were hiking in the Lost Creek wilderness on a sunny Sunday morning when they watched a creature near a pond from 100-150 feet for about 45 seconds. The creature was initially bent over and first taken for a bear, then stood erect and looked at them, provoking intense fear. The pair later returned with photographers but found no trace.

Full-body sighting
last Saturday Park County, Colorado #gid://art19-episode-locator/V0/5af0hnZsrQX9o5rcS0OK6j23rjpTC6-CDLvw0JBifUQ

Sasquatch sighting near Park County

Three friends drove back from a day of fishing when headlights lit a large human-like figure hunched by the roadside. It looked over its shoulder with bright eyes, then took a couple steps up the hill with pumping shoulders and disappeared behind a boulder. They later returned that night with a light to retrace the bend but could not relocate the spot or find tracks.

Partial sightingEyeshine
The day after we heard the noise Lake George, Park County, Colorado Related account #2493

Scat near Lake George, Colorado

The next day a dog returned to the yard carrying a very large foul-smelling scat-like mass containing hair.

Scat
about 10 minutes later Lake George, Park County, Colorado Related account #2493

Animal behaviour near Lake George, Colorado

About ten minutes after being brought inside, one dog stared toward the door, tilting its head and growling.

Animal behaviour
Date unknown Lake George, Park County, Colorado Related account #2493

Animal behaviour near Lake George, Colorado

At the time of the cry the witness peeked out and saw both dogs huddled together by the door instead of running into the woods.

Animal behaviour
Date unknown Park County, Colorado Related account #1369

Vocalization near Park County

Family members who tent-camp on the same land previously heard similar sounds and dismissed them as coyotes.

Vocalization
on two previous occasions Jefferson, Park County, Colorado Related account #64064

Unidentified sound near Jefferson, Colorado

The witness reports hearing an atmospheric deep humming like large turbines on two prior occasions in the same area.

Unidentified sound
only a few days before Lake George, Park County, Colorado Related account #63607

Scream near Lake George, Colorado

The witness and a coworker heard a loud scream twice while talking in a tent a few days earlier.

Scream
BFRO YEAR: 1970s-1980s Mammoth Hot Springs, Park County, Wyoming Class A #12302

Yellowstone backcountry ranger describes sighting, other incidents

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.

Full-body sighting