Arizona’s Sanctuary on Camelback Mountain has played host to celebrities for decades, serving as a training facility for professional athletes like the tennis player Ken Rosewall and a quiet escape from the limelight for superstars like Elton John. This summer, the secluded 53-acre resort is luring amateur jocks and health-conscious travelers with two fitness programs.
For the aspiring athlete, Sanctuary’s three-day Triathlon Prep Program (from $1,797 per person, including accommodations) is a cram session in…