LIKE SO MUCH ELSE ABOUT the late Chief Petty Officer Jon Tumilson, his running seemed at once humble and epic, gritty and glamorous, transparent and mysterious. He practiced the sport in a disciplined, measured fashion, and yet when he ran, he often seemed larger than life. These disparate, at times paradoxical, qualities showed most clearly when JT, as he was known to his Navy SEAL brethren, visited his hometown of Rockford, Iowa.
“A few years back, it was a hot summer day, over 90 degrees, and I was working here in my shop,” recalls Mark Biggs, an auto mechanic in Rockford. “I wave hello to Jon as he heads out for his run, then go about my business. Two hours later I’m driving over to Charles City, 14 miles away,…