Class B First-hand BFRO #7773

Hunters hear late night screams in the Trinity Alps Wilderness

September 1980 Friday night, around 9-10 p.m. Weaverville, Trinity County, California 2 witnesses

Account

Two hunters camping overnight on a ridge to be positioned for opening day heard a single extremely loud scream that shifted from high-pitched to deeper growl-like tones from the direction of a nearby tree line. About half an hour later their tethered mule became highly agitated and was found favoring a front leg that later swelled markedly despite no visible wound. Searches that night and the next morning revealed no source, tracks, or sign of trauma.

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
September 1980
Stated BFRO report #7773 · BFRO report, labelled fields: Year, Month
Time of day
Friday night, around 9-10 p.m.
Stated BFRO report #7773 · BFRO report, “Time And Conditions” section
Place
Weaverville, Trinity County, California
Stated BFRO report #7773 · BFRO report, labelled fields: State, County, Nearest Town, Location Details, Nearest Road
Map point
40.99, -122.87 (± 1000 m)
Stated BFRO map layer · BFRO published map layer · read with 85% confidence
BFRO map layer point for report 7773 (4 decimals, no boundary)
Account type
First-hand
Derived BFRO report #7773 · BFRO report, “Observed” section
Witnesses
2
Derived BFRO report #7773 · BFRO report, “Other Witnesses” section
Witness was
deer hunting, camped overnight on ridge for opening day
Stated BFRO report #7773 · BFRO report, “Observed” section
Source classification
Class B
Stated BFRO report #7773 · 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.

Other

rented mule's left front knee swollen with no visible trauma

Measurements: swollen to approximately twice its normal size

BFRO report, “Observed” section
Follow-up

An investigator spoke in person with the witness and consulted an experienced mule owner who opined the swollen joint must have been wrenched by something with hands that sneaked up on the animal.

BFRO report, “Follow-Up” section

Source timeline

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

  1. Published 2004-01-15 Retrieved 2026-09-24 Version 1 Hash 51b70b1265e2
    BFRO - Bigfoot Field Researchers Organization
  2. BFRO map layer Reference
    Retrieved 2026-09-24 Version 1 Hash cfb8a3d423b7
    BFRO - Bigfoot Field Researchers Organization