The Patterson-Gimlin Film: 59.5 Seconds at Bluff Creek.

What the film is, in a paragraph.

On the afternoon of October 20, 1967, Roger Patterson and Robert Gimlin — both then in their thirties, both with prior interest in the Bigfoot reports of the Pacific Northwest, both based in Yakima, Washington — were on horseback in the Bluff Creek drainage of Humboldt County, northern California. Patterson had spent the preceding weeks in the area filming a documentary on Bigfoot, financed in part with money he had borrowed and in part with money he had earned from a self-published 1966 book on the subject. The two men, on their accounts, rounded a fallen-tree obstruction along Bluff Creek in the early afternoon and saw a large bipedal figure crouched at the water's edge approximately 25 meters distant. Patterson's horse reared; Patterson dismounted with his rented Cine-Kodak K-100 16mm camera and, while running across the sandy creek bed toward the figure, exposed approximately 953 frames of Kodachrome II color film. The figure walked away from him across the sandbar, turned its head and torso to look back at one point (the so-called "film-frame 352" that has become the most-reproduced single image in Bigfoot historiography), then continued into the tree-line and was lost from view. Patterson and Gimlin took plaster casts of footprints at the site, returned to Yakima within days, and had the film developed. Within weeks Patterson was screening the footage privately in northern California and Washington; within months he was screening it nationally. The film has been studied continuously since. Patterson died of Hodgkin's lymphoma in 1972, holding to the film's authenticity. Gimlin held to the same account through public statements over five subsequent decades. Two principal claims-of-hoax have been advanced in the public record: a 1998 confession by Bob Heironimus, a Yakima acquaintance of Patterson, that he had worn the suit; and a 2004 statement by costume designer Philip Morris of Morris Costumes in Charlotte, North Carolina, that he had sold Patterson the suit by mail order earlier in 1967. Both confessions are disputed by Gimlin and by independent investigators. The film is unresolved.

The documented record.

The two filmmakers

Roger Patterson, born in 1933, had grown up in Walla Walla and was living in Yakima at the time of the film. Verified He had a background in rodeo work and small construction, and had become interested in the Bigfoot reports of the Pacific Northwest after reading a 1959 True magazine article by writer Ivan T. Sanderson. In 1966 he self-published a short book, Do Abominable Snowmen of America Really Exist?, illustrated with his own drawings and including reproductions of footprint casts from the Bluff Creek area. He had been to Bluff Creek on at least two prior occasions to investigate the area's reported tracks [1].

Bob Gimlin, born in 1931, was a Yakima friend of Patterson with a background in horse handling and ranch work. He had no prior public association with Bigfoot research before October 1967 and entered the trip largely as Patterson's traveling companion. He was paid no commercial share of the film's later revenue and, in subsequent interviews, said he had been told by Patterson the trip would last "a few weeks" [2].

The October 20, 1967 events

The events of the afternoon are reconstructed principally from Patterson's and Gimlin's own statements, given separately to interviewers in the days following and in extensive later interviews. Claimed by both:

• The two men had been riding north along Bluff Creek for several hours, prospecting the creek bed for footprints, on the afternoon of Friday October 20, 1967.
• At approximately 1:15–1:45 pm local time (Patterson's later estimate; the film's metadata does not directly establish time of day), they rounded a large fallen-tree obstruction at a bend in the creek.
• They observed, at a distance of approximately 25 meters across the open sandbar, a large bipedal figure crouched at the water's edge.
• Both men's horses reacted strongly; Patterson's horse reared, and Patterson dismounted while pulling the rented Cine-Kodak K-100 from his saddlebag.
• Patterson ran toward the figure, filming, while Gimlin remained mounted some distance behind with a rifle, instructed by Patterson not to shoot.
• The figure walked away from Patterson across the sandbar, turning its head and torso at one point to look back over its left shoulder.
• The film ran out after approximately 60 seconds. Patterson reloaded and attempted to film again but the figure was gone.

The film itself

The original film is a single roll of 16mm Kodachrome II color reversal stock, approximately 100 feet in length, of which the relevant Bigfoot footage occupies the final 953 frames. Verified The camera was a rented Cine-Kodak K-100, a clockwork-driven 16mm camera capable of several frame rates. The frame rate at which Patterson was filming on October 20 has been a central technical dispute: Patterson stated he had the camera set at 24 fps; subsequent analysts including Bill Munns and M.K. Davis have argued the run-time and the figure's gait are more consistent with 18 fps. The frame rate is consequential because it determines how fast the figure was actually walking, which in turn bears on the question of whether a person in a costume could have produced the gait observed [3].

The original camera-original film is held privately. Multiple high-quality scans have been produced and distributed; the most widely-referenced modern scans are those of M.K. Davis (1990s onward) and the more recent multi-spectral scans associated with the 2003–2005 work of Doug Hajicek for the Discovery Channel documentary Sasquatch: Legend Meets Science [4]. Verified

The footprint casts

Patterson and Gimlin took plaster casts of at least ten footprints from the sandbar in the hours following the filming. Verified The prints were approximately 14.5 inches in length, with a stride of approximately 41 inches. The casts have been examined by, among others, the primatologist John Napier (in his 1973 book Bigfoot: The Yeti and Sasquatch in Myth and Reality), the anthropologist Grover Krantz of Washington State University, and the anthropologist Jeff Meldrum of Idaho State University [5]. The casts show what appear to be skin-ridge patterns (dermatoglyphics) and what Krantz argued were a "mid-tarsal break" — flexibility in the middle of the foot inconsistent with a human foot inside a rigid costume foot. Critics including Michael Dennett have argued the dermatoglyphic patterns are artifacts of the casting process and can be reproduced in latex molds [6].

The figure ("Patty")

The figure in the film, conventionally called "Patty" by the research community (after Patterson), is bipedal, large — Patterson's estimate at the time was approximately 7 feet tall, with a hip height suggesting a total stature of 6'8" to 7'4" depending on the camera-position assumptions used — and uniformly covered in dark-brown to reddish-brown hair. Claimed by Patterson and Gimlin at the time, observed by subsequent analysts of the film: the figure appears to have pendulous breasts and visible buttocks musculature articulating with each step.

The breast and buttocks features have been a central point of analysis. Proponents of authenticity have argued that the integration of these features with the surrounding "fur" and their movement with the body in the film is beyond what 1967 latex-and-fur costume technology could have produced cleanly. Skeptics have argued that the appearance of breasts could be produced with relatively simple costume construction and that the buttocks movement is consistent with a human wearing a tight-fitting suit [3][7]. The dispute is not over what is visible on the film; it is over what a 1967 costume could and could not have produced.

The Heironimus claim (1998)

In 1998, Bob Heironimus, a Yakima resident who had known Patterson, came forward through writer Greg Long with the claim that he himself had worn the suit in the Patterson-Gimlin film. Claimed Heironimus's account, presented at length in Long's 2004 book The Making of Bigfoot, included specific details: that Patterson had paid him to wear the suit; that the suit was a brown gorilla suit modified with additional fur and prosthetics; that he had walked the path shown in the film; and that he had been paid less than promised. Heironimus passed a polygraph examination administered for the book [8].

Gimlin, in subsequent interviews, rejected the Heironimus claim and stated under oath in a 2005 affidavit that no third party had been at Bluff Creek on October 20, 1967. Independent investigators including Daniel Perez have noted internal inconsistencies in the Heironimus account, particularly regarding the route from Yakima to Bluff Creek and the suit's reported storage [9]. The Heironimus claim is, as of 2026, neither corroborated by physical evidence (the suit has never been produced) nor refuted by alternative documentation.

The Morris claim (2004)

Also in 2004, costume designer Philip Morris of Morris Costumes in Charlotte, North Carolina, publicly stated that he had sold Patterson a gorilla suit by mail-order earlier in 1967. Claimed Morris had no documentary record of the transaction; he relied on his memory and on the Heironimus account to identify Patterson as the buyer. Morris stated his suit was the suit visible in the film, and offered to reproduce the suit to demonstrate its capabilities [10].

The Morris claim has been challenged on two grounds. First, the basic appearance of the Morris-style suits of that period — relatively short, flat-pile fur, exposed costume seams, and clearly visible head-piece junctions — differs visibly from the figure in the film, which shows long, deeply layered fur, no visible seams, and integrated head-and-body articulation. Second, Morris's account has changed in specific details across multiple interviews. Like the Heironimus claim, the Morris claim is neither corroborated by physical evidence nor refuted by alternative documentation.

The Meldrum analysis

The most sustained professional anthropological work on the film has been carried out by Jeff Meldrum, associate professor of anatomy and anthropology at Idaho State University. Claimed Meldrum's analysis, presented in detail in his 2006 book Sasquatch: Legends Meet Science, focuses on the film's depiction of gait, limb proportions, and foot mechanics. Meldrum has argued that the figure's intermembral index (the ratio of arm length to leg length) is intermediate between human and great-ape proportions; that the visible gait, with its compliant knee and the apparent flexibility of the midfoot, is difficult to reproduce in a human wearing a rigid-soled costume; and that the figure's center of gravity and stride mechanics are consistent with a non-human hominoid [7]. Meldrum's analysis is contested by other anthropologists, who have argued his measurements depend on assumptions about camera position and figure-distance that are not directly recoverable from the film [6].

The contested interpretations.

The authenticity reading

The authenticity reading, advanced by Meldrum, Bill Munns (a Hollywood prosthetic effects artist who studied the film in detail across 2007–2014), and the late Grover Krantz, is that the figure in the film is a real bipedal hominoid of an unknown taxonomic category — the working name in the field is Sasquatch or simply Bigfoot. Claimed The reading's strongest specific points are the consistency of the visible gait with a non-human hominoid; the difficulty of reconciling the visible musculature with 1967 costume technology; the dermatoglyphic patterns on the footprint casts; and the consistency of Patterson and Gimlin's accounts over time, including Gimlin's continued statements long after Patterson's death removed any commercial incentive for him to maintain a fabrication [7][11].

The hoax reading

The hoax reading, advanced by James Randi, Michael Dennett, Greg Long, and others, is that the figure is a human in a costume. Claimed The reading's strongest specific points are the commercial incentives Patterson had to produce a sensational result (he was in debt at the time of the trip and the film became the basis of his livelihood until his death); the implausibility of accidentally encountering and successfully filming a creature whose existence is otherwise unsupported by physical evidence after months of fruitless searching; the convergence of two independent confessions (Heironimus and Morris) on a costume account; and the fact that no Sasquatch body, skeleton, or DNA sample has been recovered in the six decades since [8][10].

The intermediate reading

A smaller cluster of researchers, including the late John Napier and the writer John Green, have advanced an intermediate reading: the film is interesting and not obviously explained, but the absence of any corroborating physical evidence over six decades places the burden of proof firmly on the authenticity claim. Claimed On this reading the film is not dismissively a hoax (the gait and proportions are not trivially reproducible) but is also not credible evidence of a previously unknown hominoid in the absence of any other physical material. Napier wrote in 1973 that he could not rule out either possibility on the film alone [5].

The unanswered questions.

The frame rate

The fundamental technical fact of how fast Patterson was filming on October 20, 1967, has not been resolved to general satisfaction. Disputed Patterson said 24 fps; analysts who have studied the run-time and the gait have argued for 18 fps; some recent analyses, looking at clockwork-camera spin-down at the end of the roll, have suggested the rate may have been variable. The question matters because it sets the figure's actual walking speed, and a slower actual speed is more consistent with a human gait while a faster actual speed is more difficult to reproduce on foot [3][7].

The costume that would have been used, if any

If a costume was used, it has never been produced, photographed, or independently identified. Unverified The Morris account specifies a mail-order gorilla-suit base modified by Patterson; the Heironimus account is compatible with this. No suit answering this description has been recovered from Patterson's estate, the Heironimus property, or any other source. The Heironimus polygraph result is not a substitute for physical evidence; polygraph results are not admitted in U.S. federal court as proof of veracity, and the Patterson-Gimlin case turns on physical questions a polygraph cannot answer.

Conversely, the absence of any biological material

On the other side: in six decades, no skeletal remains, no carcass, no genetically identifiable hair, and no scat with non-mammalian-known DNA has been recovered from the Pacific Northwest in association with a Sasquatch-class organism. Verified Several large-scale genetic surveys of hairs collected from purported sighting locations — including the 2014 Sykes et al. peer-reviewed study at Oxford — have identified all submitted samples as known mammal species (bear, wolf, cow, human, etc.) [12]. The absence of biological material does not refute the film; it does mean the authenticity reading must explain why a putative breeding population has produced no recoverable physical evidence other than the film itself and a footprint corpus that is itself partly contaminated by known hoaxes.

The film's chain of custody between October 1967 and the first public screenings

The film was developed in Yakima and screened privately within days of the trip. The exact chain of custody between exposure on October 20 and first public projection in late October 1967 is documented in summary but not in detail. Whether the film was modified or edited during this brief window has been variously claimed but is not, on the existing record, established [11]. Unverified

The deathbed statement question

Patterson is reported by several sources to have maintained the film's authenticity on his deathbed in 1972. Claimed The contemporary documentation of a deathbed statement is limited; the accounts derive principally from family members who had a personal stake in the film's reputation. The reports are consistent with Patterson never having recanted, but a formal documented deathbed declaration in the technical legal sense does not exist in the public record.

Primary material.

The accessible primary record on the Patterson-Gimlin film is held principally in private collections and through a small number of institutional and online archives:

• The original camera-original 16mm film is privately held by the Patterson family estate. Multiple modern scans of the film — including the M.K. Davis scans and the Bill Munns analytical scans — have been produced from intermediate copies under access agreements with the estate.
• The footprint casts from the Bluff Creek sandbar are distributed across several private and institutional collections, with portions held by the Idaho State University collection assembled by Jeff Meldrum.
• Bob Gimlin's recorded statements, including the 2005 sworn affidavit rejecting the Heironimus claim and a substantial series of recorded interviews dating from 1967 through 2018, are accessible through the archives of the International Bigfoot Society and through Daniel Perez's Bigfoot Times newsletter back-issues.
• The Patterson 1966 book Do Abominable Snowmen of America Really Exist?, the contemporaneous newspaper coverage of the film in late 1967 and 1968, and the John Napier 1973 monograph are available through standard library channels.

Critical individual items include: the original 953 frames of film; the footprint casts taken on October 20, 1967; Patterson's contemporaneous report submitted to the U.S. Forest Service; Gimlin's 2005 affidavit; Bob Heironimus's polygraph examination report (1998); and the Bill Munns frame-by-frame technical analysis published in 2014.

The sequence.

1. 1958 The "Bigfoot" name enters wider U.S. circulation following the Jerry Crew footprint casts at Bluff Creek and an Associated Press story by Andrew Genzoli.
2. 1959 Ivan T. Sanderson's True magazine article on the Pacific Northwest Sasquatch reports brings the subject to a national audience.
3. 1966 Roger Patterson self-publishes Do Abominable Snowmen of America Really Exist?
4. Summer 1967 Patterson plans a documentary on Bigfoot; according to the later Morris claim, orders a gorilla suit by mail from Morris Costumes in Charlotte, NC.
5. October 20, 1967 (afternoon) Patterson and Gimlin film the 59.5 seconds of Kodachrome II footage at Bluff Creek.
6. October 20, 1967 (evening) The two men take plaster casts of footprints from the sandbar.
7. Late October 1967 Film developed in Yakima. First private screenings.
8. November 1967 Patterson begins public screenings of the film across northern California and the Pacific Northwest.
9. 1968–1972 Film distributed nationally and internationally; Patterson lives on screening fees and book sales.
10. January 15, 1972 Roger Patterson dies of Hodgkin's lymphoma in Yakima, Washington, age 38.
11. 1973 John Napier publishes Bigfoot: The Yeti and Sasquatch in Myth and Reality, concluding the film cannot be conclusively resolved either way.
12. 1998 Bob Heironimus publicly claims to have worn the suit in the film; passes a polygraph for writer Greg Long.
13. 2003–2005 Doug Hajicek produces enhanced scans of the film for the Discovery Channel documentary Sasquatch: Legend Meets Science.
14. 2004 Greg Long publishes The Making of Bigfoot; Philip Morris publicly claims to have sold Patterson the suit.
15. 2005 Bob Gimlin gives a sworn affidavit rejecting the Heironimus account.
16. 2006 Jeff Meldrum publishes Sasquatch: Legends Meet Science.
17. 2014 The Sykes et al. peer-reviewed survey identifies all submitted hair samples as known mammals.
18. 2014 Bill Munns publishes When Roger Met Patty, a frame-by-frame technical analysis.
19. 2018–present Gimlin continues to make public appearances; the case remains substantively unresolved.

Cases on this archive that connect.

The Wow! Signal (File 036) — a comparable case in which a single piece of putative evidence has resisted both confirmation and refutation for decades.

The Dyatlov Pass Incident (File 002) — a different case-type with a similar epistemic structure: the physical record exists, multiple analyses have been published, and the central question remains contested by competent investigators.

The Mothman of Point Pleasant (File 085) — a contemporary case of putative cryptid sightings, less centered on a single piece of photographic evidence but raising the same questions about how to weigh witness testimony against physical record.

The Cottingley Fairies (File 107) — the contrasting case in which a sustained admission did eventually resolve four of five putative photographs, with the fifth retaining a similar irreducible uncertainty to the one that surrounds the Patterson-Gimlin film.

More related files coming as the archive grows. Planned: the Skookum Cast (2000), the Wallace footprint hoax acknowledgement (2002), and a broader file on the cryptid evidence problem.

Full bibliography.

1. Patterson, Roger. Do Abominable Snowmen of America Really Exist? Franklin Press, Yakima, WA, 1966.
2. Gimlin, Bob. Sworn affidavit on the events of October 20, 1967. Executed 2005.
3. Munns, Bill. When Roger Met Patty. Munns Creature Gallery Publishing, 2014. Frame-by-frame technical analysis of the film, including frame-rate and camera-position reconstruction.
4. Hajicek, Doug (producer). Sasquatch: Legend Meets Science. Discovery Channel documentary, 2003.
5. Napier, John. Bigfoot: The Yeti and Sasquatch in Myth and Reality. E.P. Dutton, 1973.
6. Dennett, Michael. "Bigfoot Evidence: Are These Tracks Real?" Skeptical Inquirer, Spring 1989.
7. Meldrum, Jeff. Sasquatch: Legends Meet Science. Forge Books, 2006.
8. Long, Greg. The Making of Bigfoot: The Inside Story. Prometheus Books, 2004.
9. Perez, Daniel. Bigfoot at Bluff Creek. Center for Bigfoot Studies, 1994; updated 2017.
10. Morris, Philip. Public statements and interviews on the Patterson suit transaction, 2002–2010, archived in Long (2004) and in Morris Costumes corporate communications.
11. Green, John. Sasquatch: The Apes Among Us. Hancock House, 1978; revised 2006. The standard historiographic survey through Green's death.
12. Sykes, Bryan C., et al. "Genetic analysis of hair samples attributed to yeti, bigfoot and other anomalous primates." Proceedings of the Royal Society B, Vol. 281, Issue 1789, 2014.
13. Krantz, Grover. Big Footprints: A Scientific Inquiry into the Reality of Sasquatch. Johnson Books, 1992.
14. Bord, Janet and Colin. The Evidence for Bigfoot and Other Man-Beasts. Aquarian Press, 1984.