Race with the Devil is a 1975 American action horror film directed by Jack Starrett, written by Wes Bishop and Lee Frost, and starring Peter Fonda, Warren Oates, Loretta Swit, and Lara Parker.

Later that night, after their wives retire to the RV, the men witness what turns out to be a Satanic ritual human sacrifice (Peggy Kokernot) a short distance from their campsite, across a river.

After being chased by the Satanists and barely escaping with their lives, they arrive in a small town and report the incident to Sheriff Taylor, who investigates but attempts to convince them that they probably only saw hippies killing an animal.

Unbeknownst to the sheriff, Roger steals a sample of dirt stained with the murder victim's blood, intent on delivering it to the authorities in Amarillo, as he became suspicious of being driven to the crime scene without having to offer any directions.

At the same time, while cleaning, the wives find a cryptic rune pinned to the broken rear window of the RV, and they steal books about occultism from the local library to further research the incident, unaware they're being watched by a man in a red truck.

As the foursome leaves town, the sheriff notices the red truck that begins to follow the RV, making it clear that he is either aware or part of the Satanic cult.

When they return from dinner, the group discovers that Kelly's dog has been killed and hanged from the RV's broken open door, causing them to immediately leave the park.

The frightened Kelly and Alice scream and panic, causing Frank to accidentally drive into a tree and break the RV motor's fan before the snakes are killed.

In the middle of their celebration, they hear chanting outside the RV and find themselves surrounded by cult members wearing black robes with hoods, including Sheriff Taylor and the couple with whom they had dinner.