Class A First-hand BFRO #42602

Backpackers hear growls, knocking and observe two large, hairy bipeds at Surprise Lake

13 June 2012 dusk, between 7 and 9 Silverthorne, Summit County, Colorado 2 witnesses

Account

The witness and a companion were camped at Surprise Lake at dusk when they heard patterned knocks and rock-on-tree sounds. After the witness threw a rock against a tree and heard a similar sound returned, they saw a large brownish-red animal squatted and swaying behind a tree upslope. They attempted blurry photos while knocks were heard from behind the camp and from the animal's direction before leaving at first light.

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

Sounds

Interaction

Described appearance

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

Build src
large shoulders
Hair colour src
brownish red
Face src
large head with large brow line and nose
Posture src
squatted down peeking from behind tree
Age / size src
large
Other features src
nose and upper lip lighter color than rest

Facts & provenance

Each value names where it came from.

Date
13 June 2012
Stated BFRO report #42602 · BFRO report, labelled fields: Year, Month, Date
Time of day
dusk, between 7 and 9
Stated BFRO report #42602 · BFRO report, “Time And Conditions” section
Place
Silverthorne, Summit County, Colorado
Stated BFRO report #42602 · BFRO report, labelled fields: State, County, Nearest Town, Location Details
Map point
39.81, -106.30 (± 1000 m)
Stated BFRO map layer · BFRO published map layer · read with 85% confidence
BFRO map layer point for report 42602 with published boundary
Account type
First-hand
Stated BFRO report #42602 · BFRO report, “Observed” section
Witnesses
2
Stated BFRO report #42602 · BFRO report, “Other Witnesses” section
Figures reported
1
Derived BFRO report #42602 · BFRO report, “Observed” section · read with 80% confidence
Witness was
camping and sitting in tent at lakeside camp
Stated BFRO report #42602 · BFRO report, “Observed” section
Witness's word for it
large, brownish red animal
Stated BFRO report #42602 · BFRO report, “Observed” section
Source classification
Class A
Stated BFRO report #42602 · 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
Scott Miles (BFRO)
Photograph

blurry sport-camera photos, one said to show head if zoomed

BFRO report, “Observed” section
Photograph

An investigator interviewed the witnesses by phone, reviewed their blurry photo, noted no other people and undisturbed food, and planned a follow-up survey.

BFRO report, “Follow-Up” section
Follow-up

An investigator interviewed the witnesses by phone, reviewed their blurry photo, noted no other people and undisturbed food, and planned a follow-up survey.

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 2013-11-10 Retrieved 2026-09-24 Version 1 1 image at source Hash a62d5628d150
    BFRO - Bigfoot Field Researchers Organization
  2. BFRO map layer Reference
    Retrieved 2026-09-24 Version 1 Hash cfb8a3d423b7
    BFRO - Bigfoot Field Researchers Organization