Boulder endurance athlete Michael Stone, who is legally blind, won his second title at the XTERRA off-road triathlon nationals. Courtesy photo

Boulder's Michael Stone won his second national triathlon title on Saturday, taking first in his division at the XTERRA USA Championship off-road triathlon in Ogden, Utah. Stone, who is legally blind, raced in the physically challenged division.

Stone had the best time for all three portions of the triathlon and finished with a winning time of 3:59:58.