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4 encounters
12 March 2025 Hot Springs, Custer County, South Dakota Class B #79740

Mouth pops heard by Mountain Lion hunter near Custer State Park

The witness was concealed while hunting mountain lion and using a distressed-fawn predator call. From behind, the witness heard repeated knock-like or mouth-pop sounds from two directions, followed by deep mumbling described as an unfamiliar language. The witness saw nothing, moved into the open, then quickly hiked out and has not returned to the area.

Unidentified soundVocalization
August 2004 Mackay, Custer County, Idaho Class B #10960

Possible stalking outside a campers' tent in the White Knob mountains

On the last night of a camping trip, the witness lay awake in a tent around midnight and heard close footsteps and deep breathing from a large presence outside. The witness sat up, armed, and turned on a flashlight, after which all sounds stopped and a sudden intense dread lifted. No animal was seen, no odor was noticed, and nothing further happened that night.

FootstepsUnidentified sound
September 2001 Stanley, Custer County, Idaho Class B #13717

Possible vocalizations heard by staff at Redfish Lake near Stanley

Around midnight in September, the witness was walking between facilities when loud growl-to-scream vocalizations began from a creek bed about 300 yards away. The calls repeated 10-15 times over 15-20 minutes while the source seemed to move nearer, farther, and side to side. The witness brought a neighbor outside so both heard the sounds, then returned to the cabin and kept weapons close. A next-day search of the creek bed found no tracks or other sign.

GrowlScream
about 3 years earlier Custer, Custer County, South Dakota Related account #19350

Vocalization near Custer, South Dakota

The witness had heard the same moaning crying sound during a prior season at the same camp about three years earlier.

Vocalization