She subsequently co-starred with Peter Fonda in "92 in the Shade" (also 1975), a drama directed by novelist Thomas McGuane, based on his own book. While filming, Kidder became romantically involved with McGuane, and in March 1975 relocated with him to Livingston, Montana. She subsequently became pregnant, and gave birth to their only child, daughter Maggie McGuane, on October 28, 1975. During this time, Kidder took a hiatus from acting, though she appeared in the March 9, 1975 edition of "The American Sportsman", learning how to hang glide, and providing the narration, with a remote microphone recording her reactions in flight; the segment concluded with Kidder doing solos soaring amid the Wyoming Rockies. She was also photographed by Douglas Kirkland for the March 1975 issue of "Playboy", accompanied by an article written by Kidder herself. Kidder and McGuane married on August 2, 1976, but the marriage ended in divorce on July 21, 1977. During the marriage, Kidder stated that her self-esteem had faltered significantly, and she found it difficult to maintain a career in film while residing in Montana.