From a horror standpoint, "Memorial Valley Massacre" is a worthless slasher that no serious horror fan should bother with. What saves it from being a total bomb is the tongue-in-cheek approach of the filmmakers, at least in the first half. For example, early on a man says "We've got a problem with the water" (the movie is set on a camp) and proceeds to pull a dead dog out of the well! Hilarious! Then Cameron Mitchell (who appears for about 2 minutes as an investor; did he actually get paid for this?) asks: "Screw the dog, is the water fit to drink?" (!!!). The film also includes the following exchange: "Are you the head ranger here?" - "Well, I'm the only ranger here, so I guess you can say I'm the head one". Oh, and the primitive kid who has lived all his life away from civilization, apparently knows how to create a gas explosion. (*1/2)