Ronald G. Hayes (February 26, 1929 – October 1, 2004)^[1] was an American television actor, who as an activist in the environmental movement, worked for the establishment of the first Earth Day, observed on April 22, 1970. He was a member of the Sierra Club and a founder of the ecological interest group Wilderness World.^[2]

On television, Hayes guest-starred in Bat Masterson, in a recurring role as Wyatt Earp (1959 to 1961) and again as Jeremy French (1960). Hayes played Owens in "Rawhide" S2 E8 "Incident of the Haunted Hills" which aired 11/5/1959. He played the doomed suitor Paul Bradley in "Wanted: Dead or Alive" S2 E10 "Reckless" which aired 11/6/1959.

Hayes was a regularly seen face, in various characters showing a wide range of acting skill, on Gunsmoke.

He also played a blinded U.S. Army captain in an episode of Don't Call Me Charlie! (1962),^{[citation needed]} and he also co-starred in the ABC Western comedy The Rounders (1966)^[3] and portrayed Lincoln Vail in the syndicated adventure series The Everglades (1961).^[4] Hayes also guest-starred in one episode of The High Chaparral and two episodes of Death Valley Days as the editor of the newspaper reporting Custer's last stand and the Devil's Bar.

• Cheyenne as Durango Kid (1957) in "Town of Fear"
• Tombstone Territory as outlaw Chick Umbir (1959) in "The Day of Amnesty"
• The Rifleman as Bruce (1960) in "Six Years and a Day"
• Bat Masterson as Jeremy French (1960) and in a recurring role as Wyatt Earp (1959-1961)
• Rawhide (1961) – Owens in S2:E8, "Incident of the Haunted Hills"
• Rawhide (1962) – Frank Louden in S5:E6, "Incident of the Four Horsemen"
• The Virginian as Marshal Brett Cole (1963)
• Gunsmoke as Jud
• Bonanza as Jarred (1966) in "Bridesgroom"