| Date | July 12–16, 1924 |
| Location | Ape Canyon, Mount St. Helens, Skamania County, Washington |
| Caused by | Territorial encroachment by gold prospectors into a Sasquatch-inhabited region of the Cascade volcanic badlands |
| Resulted in | Deaths of an estimated four to seven Sasquatch; partial destruction of the Ape Canyon cabin; first formal use of 'Sasquatch' in a law enforcement document; formal designation of Ape Canyon by the U.S. Forest Service (1929) |
| Parties | Fred Beck prospecting party · Sasquatch (unclassified bipedal primates) |
| Lead figures | Fred Beck, Gabe Leford, Marion Smith, Roy Smith, John Peterson, Deputy Harlan Meuse, Frederick Ape |
The Ape Canyon Incident and the Sasquatch Massacre was a prolonged territorial dispute and series of documented confrontations occurring between July 12 and July 16, 1924, in the volcanic badlands northeast of Mount St. Helens, in what is now Skamania County, Washington. The events resulted in the deaths of an estimated four to seven Sasquatch, the partial destruction of a prospectors' cabin, and the first formal use of the term "Sasquatch" in a filed law enforcement document, a deputy's incident report submitted to the Cowlitz County Sheriff's Office on July 18, 1924.
By the early 1920s, the region surrounding Mount St. Helens had attracted a modest population of independent gold prospectors, drawn by trace placer deposits reported in the drainage channels of the Lewis River watershed. Among these was a party of five men — Fred Beck, Gabe Leford, Marion Smith, Roy Smith, and John Peterson — who had established a mining claim in the summer of 1923 approximately three miles northeast of the canyon later designated Ape Canyon. The men constructed a single-room log shelter, referred to in subsequent accounts as the "Ape Canyon cabin," at an elevation of roughly 5,800 feet.
Tension between the prospecting party and what they described as large, bipedal, hair-covered figures had been building for several weeks prior to July 1924. Beck and Leford both recorded observations in their field journals — held in part at the Washington State Historical Society, Tacoma — noting displaced equipment, unfamiliar vocalizations at night, and, on at least three occasions, large footprints of between 17 and 19 inches in length pressed into the volcanic ash near the camp perimeter. Frederick Ape, a Forest Service surveyor who had worked the adjacent ridgeline in the spring of 1924, had filed a separate memorandum with the Gifford Pinchot National Forest office in Vancouver, Washington, noting similar disturbances along the survey transect designated Line 7-C. That memorandum, cataloged under Forest Service Record Group 95, is cited by researchers as among the earliest federal acknowledgment of anomalous primate-type activity in the Cascades.
### Saturday, July 12
On the morning of July 12, 1924, Fred Beck reported seeing a large figure standing at the tree line approximately 80 yards from the cabin. Beck discharged his rifle — a .30-06 Springfield — three times. One shot was believed to have struck the figure, which retreated into the forest. No body was recovered. The incident was logged in Beck's field journal as a "defensive discharge" and was not initially reported to authorities.
### Sunday, July 13
The following evening, the prospecting party returned to the cabin after a day's work at the claim to find the door displaced from its frame and several supply containers overturned. A second large figure was observed moving through the timber at the canyon's edge. Marion Smith fired twice with a .22 caliber rifle. The figure did not retreat immediately. Leford's journal entry for the date describes the encounter as "longer than was comfortable."
### Monday, July 14
The most sustained confrontation occurred on the night of July 14 into the early hours of July 15. According to sworn statements provided to Cowlitz County Deputy Harlan Meuse on July 18, the cabin was subjected to repeated impact from the exterior — rocks, timber debris, and what Beck described as "fist-sized volcanic stones" struck the roof and walls over a period of approximately four hours. Beck estimated the number of figures outside at between three and six based on the distribution of impact sounds. The prospectors did not exit the cabin during this period. The attack ceased before dawn.
### Tuesday, July 15
On the morning of July 15, the party exited the cabin and found the surrounding area disturbed across a radius of roughly 40 feet. Beck discharged his rifle at a figure retreating toward the canyon rim and reported the figure fell from sight into the gorge below, an account corroborated by Smith's statement to Deputy Meuse. This death, along with the estimated casualties from prior exchanges, gives the event the name by which it is now commonly known. The prospecting party descended to the town of Kelso by late afternoon and filed their report the following morning.
Deputy Meuse's incident report, filed July 18, 1924, is the primary contemporaneous document. It recorded the testimony of four of the five prospectors (Peterson declined to provide a formal statement) and noted that a follow-up inspection of the cabin site was conducted on July 22 by Meuse and two Forest Service personnel. The inspection report, also held in Forest Service Record Group 95, confirmed structural damage to the cabin consistent with sustained external impact and noted a "large quantity of footprints" in the surrounding ash field, though no biological remains were located in the canyon below.
Regional newspapers, including the *Longview Daily News* and the *Portland Oregonian*, carried short accounts of the incident in late July 1924, generally under headers referencing "wild men" or "mountain apes." The *Oregonian* account of July 27 was the first to use the word "Sasquatch" in print in connection with the Mount St. Helens region, though the term had been in limited circulation in British Columbia Indigenous oral and written records for several decades prior.
The Ape Canyon Incident is widely regarded as the foundational modern Sasquatch encounter in the Pacific Northwest and is cited in nearly all subsequent taxonomic and folkloric treatments of the subject. The canyon was formally designated "Ape Canyon" by the U.S. Forest Service in 1929, with the naming rationale recorded in a Gifford Pinchot National Forest administrative bulletin dated March 4 of that year.
Fred Beck later co-authored a self-published account of the events, *I Fought the Apemen of Mt. St. Helens* (1967), written with his son Ronald Beck. The account introduced several narrative details not present in the 1924 sworn statements, including a description of a Sasquatch of "at least ten feet in height," which Beck attributed to his clearest sighting. Researchers at the Bigfoot Field Researchers Organization have noted the discrepancies between the 1924 documentation and the 1967 account, characterizing the later text as an elaboration rather than a contradiction of the earlier record.
Skamania County passed Ordinance No. 69-01 in 1969, prohibiting the killing of Sasquatch within county limits and establishing a fine of $10,000 and up to five years imprisonment for violations. Legal scholars have noted the ordinance implicitly classifies the July 15, 1924 canyon death as a pre-jurisdictional event, a determination that has never been formally challenged in court.
The Ape Canyon Incident has been referenced in numerous cryptozoological publications, most extensively in John Green's *Sasquatch: The Apes Among Us* (1978) and in Grover Krantz's *Big Footprints* (1992). A commemorative trail marker was installed at the canyon overlook in 1998 by the Mount St. Helens National Volcanic Monument interpretive program, identifying the site as the location of the 1924 events. The marker does not use the word "massacre."
A dramatized account of the incident was produced for regional public radio in 2004 by KPLU Tacoma under the title *Night on the Mountain*, and the events form the narrative basis of at least three self-published novels available through Pacific Northwest regional distributors as of 2023. The incident is also cited in the Sort of History entry on Frederick Ape (/wiki/ape-canyon), the Forest Service surveyor whose 1924 memorandum provides the earliest federal corroboration of the prospectors' accounts.