Matthews completed the race in 3 hours, 47 minutes, 55 seconds to finish behind winner Greg Bennet of Boulder, Colo., [3:45:39] and runner-up Joe Gambles, also of Boulder [3:46:14].
Matthews, 29, finished the 1.2-mile swim in 21:54, the 56-mile bike in 2:07:09, and the 13.1-mile run in 1:15:54.
Fellow Santa Cruz resident and pro triathlete Eric Clarkson placed 23rd [4:13:27]. He finished the swim in 23:35, the bike in 2:20:41 and the run in 1:25:25.
The event was a qualifier for the Ironman World Championships, which will be held in Las Vegas in September.
Results included in this report are from RaceResults360.com.