ST. GEORGE, Utah — After 16 years of grueling endurance, global recognition, and community pride, St. George is preparing to host its final Ironman race this weekend—marking the end of what many have called the most challenging Ironman event in the United States. On Saturday, approximately 2,500 athletes will take part in the Ironman 70.3 North American Championship, which begins at Sand Hollow Reservoir and finishes along Main Street in downtown St. George. The race will not only close a chapter in the city’s sporting history but also attract a record number of competitors—up by 1,000 from the previous year—many…