She married Charles Johnston and they moved to Wadsworth briefly, later buying property along the Truckee River near Painted Rock exit along I80.
[citation needed] As large parts of Nevada were thereby excluded from the bill, Johnston continued to fight for protection of the free-roaming horses throughout the state and across all the federal lands in the west.
On September 8, 1959, the campaign resulted in the federal legislature passing Public Law 86-234, which banned the poisoning of watering holes frequented by wild equids and the use of air and land vehicles in hunting and capturing free-roaming horses for sale and slaughter.
Johnston continued her campaign, and in 1971, the 92nd United States Congress unanimously passed the Wild and Free-Roaming Horses and Burros Act of 1971.
[8] The 1961 western The Misfits, based on a script by Arthur Miller, the last film of Clark Gable and Marilyn Monroe and also starring Montgomery Clift, portrayed a horse roundup of the sort Johnston had protested; in the film, Monroe's character becomes disgusted with the method, which leads to a climactic clash between the characters.
Johnston herself appeared in the Robert McCahon 1973 western Running Wild as herself, starring alongside Lloyd Bridges and Dina Merrill.
In March 2011, Wendie Malick was set to star and produce Wild Horse Annie, for Hallmark Channel for summer 2012.