51 user 28 critic

The Beast of Hollow Mountain (1956)

Approved | | Romance, Sci-Fi, Western | August 1956 (USA)
An American cowboy living in Mexico discovers his cattle are being eaten by a giant prehistoric dinosaur.


Edward Nassour, Ismael Rodríguez (as Ismael Rodriguez)


Robert Hill (screenplay), Jack DeWitt (additional dialogue) | 1 more credit »


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Complete credited cast:
Guy Madison ... Jimmy Ryan
Patricia Medina ... Sarita
Carlos Rivas ... Felipe Sanchez - Jimmy's Partner
Mario Navarro Mario Navarro ... Panchito
Pascual García Peña Pascual García Peña ... Pancho
Eduardo Noriega ... Enrique Rios
Julio Villarreal ... Don Pedro
Lupe Carriles ... Margarita


An American cowboy living in Mexico discovers his cattle are being eaten by a giant prehistoric dinosaur.

Plot Summary | Plot Synopsis


And introducing the new REGISCOPE Process See more »


Approved | See all certifications »

Parents Guide:

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Mexico | USA


English | Spanish

Release Date:

August 1956 (USA) See more »

Also Known As:

Valley of the Mists See more »

Filming Locations:

Cuernavaca, Morelos, Mexico See more »

Company Credits

Show more on IMDbPro »

Technical Specs


Sound Mix:

Mono | Mono (RCA Sound Recording)



Aspect Ratio:

2.35 : 1
See full technical specs »

Did You Know?


A Spanish-language version was shot back-to-back with the English-language version. See more »


The footage of the stampeding cattle is obviously sped up. See more »


Don Pedro: Well, maybe that's your answer. That swamp is a very mysterious and sinister place.
See more »


Featured in Svengoolie: The Beast of Hollow Mountain (1995) See more »

Frequently Asked Questions

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User Reviews

I remembered it from by childhood, and loved seeing it again
30 June 2013 | by CarlNaamanBrownSee all my reviews

Back in the 1950s, the big family weekend outing would be the drive-in movies. "It came from beneath the Sea", "The Alligator People", "Earth vs the Flyimg Saucers", "1984", "The Dam Busters", "The Four Skulls of Jonathan Drake", "Love Slaves of the Amazons", etc. and (when I was 8 or 9) "The Beast from Hollow Mountain". I finally caught it again on DVR on TCM Thur 27 Jun 2013. For what is billed as the first Cinemascope and Color dinosaur movie, "Beast" has rough goodness.

And it is better than I remember. Surprised me. The dinosaur effects are some what better than "Dinosaurus!" 1960 (apparently the reviewers panning the FX have not seen "Dinosaurus!"), but it is not as good as what Willis O'Brien and Ray Harryhausen did together in Irwin Allen's "Animal World" 1956. I think the "Beast..." FX were billed as RegiScope animation in depth.

I have read that Willis O'Brien's "cowboys and dinosaurs" idea had been kicking around since before his "Mighty Joe Young" another movie where O'Brien and Harryhausen worked together. And after O'Brien's death, Harryhausen decided to make his mentor's unmade pet project as "The Valley of Gwangi".

The dinosaur in "Beast..." appears late and the conflict between the gringo rancher Ryan from Texas and the Mexican rancher Enrique, and the growing romance between Ryan and Sarita, Enrique's betrothed, occupies the first two thirds or three fourths of the movie. Mysterious deaths of cattle are attributed to rustlers and the ranchers' rivalry. But after the steer-chomping Beast makes his appearance, he has lotsa screen time in the last part of the film. (OK, I concede the tongue gets to be a bit much in some scenes. Looks to me like the tongue was rotoscoped onto the sequences shot with replacement animation.)

What has stayed with me from seeing this film over fifty years ago, is the scene where Sarita and the kid Panchito are besieged in a cabin by the Beast. That was scary then, and is still is a moment (or that may be my nostalgia acting up again).

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