The Ironman triathlon is one of the most famous endurance races in the world. Consisting of a 2.4-mile swim, a 112-mile bike ride, and a 26.2-mile run, it requires significant physical and mental fitness training (Atkinson, 2008) as well as substantial investments in equipment, time, and emotional energy. As opposed to more casual leisure pursuits, the Ironman triathlon can be considered a serious leisure pursuit (Stebbins, 1982). Like other serious athletic leisure pursuits, participation in triathlon can facilitate personal growth experiences, especially through overcoming sport-related adversity (e.g., Atkinson, 2008; Connaughton et al., 2010; Galli & Reel, 2012). In fact, researchers have reported self-discovery, empowerment, agency, and mental toughness as potential benefits of sport-related growth through adversity (Atkinson, 2008; Cronan & Scott, 2008; Galli & Vealey, 2008; Granskog, 1992, 2003; Howells & Fletcher, 2015; Howells et al., 2017; Sarkar et al., 2015).