After a search for his father's killers, Wes Evans returns home only to find himself involved in a bloody land dispute.
Unfortunately the movie Massacre At Grand Canyon is not yet available on HBO Max.
| Directing | Sergio Corbucci | Director |
| Writing | Edward C. Geltman | Story |
| Writing | Albert Band | Screenplay |
| Writing | Sergio Corbucci | Screenplay |
| Production | Albert Band | Producer |
| Sound | Gianni Ferrio | Original Music Composer |
| Editing | Franco Fraticelli | Editor |
| Art | Giuseppe Ranieri | Production Design |
| Camera | Stelvio Massi | Camera Operator |
| Writing | Fede Arnaud | Dialogue |
| Directing | Franco Giraldi | Second Unit Director |
| Directing | Albert Band | First Assistant Director |
| Production | Lucio Trentini | Unit Manager |
| Production | Alfredo Nicolai | Unit Manager |
| Production | Placido Di Salvo | Production Secretary |
| Crew | Benito Stefanelli | Stunt Coordinator |
| Directing | Renzo Ragazzi | Script Supervisor |
| Production | Angelo Picchi | Accountant |
| Camera | Mario Alberti | Assistant Camera |
| Camera | Enrico Fontana | Assistant Camera |
| Editing | Adriana Benedetti | Assistant Editor |
| Production | Danilo Marciani | Production Manager |
| Production | Turi Vasile | Producer |
| Camera | Enzo Barboni | Director of Photography |
| Costume & Make-Up | Italia Scandariato | Costume Design |
| Costume & Make-Up | Rino Carboni | Makeup Artist |
| Costume & Make-Up | Giovanni Palombi | Hairstylist |
| Sound | Alberto Bartolomei | Sound |
