The original Muscle Beach, in Santa Monica, California, is considered by many to be the birthplace of the modern physical fitness movement. From 1934 to 1958, the strip of sand south of the Santa Monica Pier offered acrobats, gymnasts, weightlifters, and bodybuilders a place to learn, train, and perform feats of physical culture. This milieu helped shape the careers of fitness luminaries like Jack LaLanne, Vic Tanny, and Steve Reeves; it also catalyzed the development of modern fitness equipment and health clubs. The site's popularity peaked in the post-war period, especially over summer holidays, when up to 2,000 spectators crowded around an elevated platform by the boardwalk to watch the annual Mr. and Miss Muscle Beach contests and other acrobatic and strength exhibitions. In the American imagination, Muscle Beach became a symbol of the mid-century California dream, the promise of sunshine, health, and good living captured in iconic images of the toned and tan beach athletes. Despite these real and symbolic legacies, Muscle Beach remains an understudied site, especially from scholarly perspectives. The essays that constitute this work examine Muscle Beach using three different historical points of engagement. In the first study, I offer a theoretical perspective for unpacking the widespread influence of Muscle Beach. Drawing from oral history interviews with several Muscle Beach legends, I argue that the role of Muscle Beach in ushering in the modern fitness movement is best understood as the result of social processes of innovation. In the second study, I explore the abrupt closure of Muscle Beach by the city of Santa Monica in late 1958 and I evaluate the civic legacy of the site for the city. In the third and final study, I analyze the use of Muscle Beach in the fitness magazines of Joe Weider. I argue that Weider deployed a mythic Muscle Beach, creating an imaginative take on the California dream for his readers and customers. Combined, these studies advance the historical understanding of Muscle Beach as both a real and symbolic place. / text