You may have seen this movie as Giant from Devil’s Crag and The Diablo Giant. It’s directed by Richard E. Cunha, who also directed She Demons, Missile to the Moon and Frankenstein’s Daughter. It tells a story that started way before it became a big deal in the 70s — cattle mutation by alien forces!
It stars Buddy Baer — the man who nearly beat Joe Lewis and the brother of Max Bear — as the gigantic Vargas. And even better, it has makeup by Jack Pierce, the same man who did the effects for the Universal Monsters.
Just as interesting in light of UFO theories that also became more popular years later, the alien creatures in the film are thought to be demons or gods by the Native Americans that have encountered them for centuries.
You can watch this on Tubi.