Class B First-hand BFRO #65650

Possible vocalizations on Little Si Trail outside North Bend

31 October 2015 about 12pm Mt Si, King County, Washington 2 witnesses

Account

Two people hiking in the morning heard a repeated loud alarm-like holler ending each time in a strange ape- and human-like vocalization. The witness imitated the sound a few times, and both listeners concluded it could not be human or a wolf/coyote due to lung capacity and lip-like articulation. Believing the source sounded closer and could be a large unknown animal, they ran back to the car without seeing anyone else on the trail.

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.

Sounds

Facts & provenance

Each value names where it came from.

Date
31 October 2015
Stated BFRO report #65650 · BFRO report, labelled fields: Year, Month, Date
Time of day
about 12pm
Stated BFRO report #65650 · BFRO report, “Time And Conditions” section
Place
Mt Si, King County, Washington
Stated BFRO report #65650 · BFRO report, labelled fields: State, County, Nearest Town, Location Details, Nearest Road
Map point
47.49, -121.76 (± 1000 m)
Stated BFRO map layer · BFRO published map layer · read with 85% confidence
BFRO map layer point for report 65650 with published boundary
Account type
First-hand
Stated BFRO report #65650 · BFRO report, “Observed” section
Witnesses
2
Stated BFRO report #65650 · BFRO report, “Other Witnesses” section
Witness was
hiking with a friend
Stated BFRO report #65650 · BFRO report, “Observed” section
Witness's word for it
a Sasquatch
Stated BFRO report #65650 · BFRO report, “Observed” section
Source classification
Class B
Stated BFRO report #65650 · BFRO classification label

Evidence & investigation

What the source says was found or done. Claimed evidence is listed as claimed; the Anomadex has not examined it.

Investigated by
Matthew Moneymaker (BFRO)

Source timeline

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

  1. Published 2020-06-28 Retrieved 2026-09-24 Version 1 Hash 246054780406
    BFRO - Bigfoot Field Researchers Organization
  2. BFRO map layer Reference
    Retrieved 2026-09-24 Version 1 Hash cfb8a3d423b7
    BFRO - Bigfoot Field Researchers Organization

The report refers to

  • “the Sierra recordings”
    Not in the Anomadex yet
  • “countless first hand stories from people out there”
    Not in the Anomadex yet