Ernie Lacroix reached two milestones on February 23: He finished his 20th-straight Cowtown 5K, and his first race as a 100-year-old. The Fort Worth, Texas, resident hit the century mark the day before on February 22, and what better way to celebrate than to do so by embarking on that time-honored tradition? “I have no idea of what prompted me to give the Cowtown a go,” Lacroix told Runner’s World. “I knew beforehand that I didn’t have a chance to win anything, but all the people obviously enjoying the competition looked like fun, so I gave it a go. I...