Cookeville resident Brian Shelton shaved six minutes off last year’s best time to win the fourth annual Viola Valley Half Marathon held earlier this month.Shelton finished the race in 1:14:07, a pace that translates to a blistering 5:39 per mile pace.Murfreesboro resident Julie Ulery was the top female finisher with a time of 1:27:49, a pace of 6:42 per mile.Ray Bishop was the fastest local runner, finishing the half marathon in the No. 8 spot in 1:28:14. He was followed by two more Warren County residents in Amiel Emerson at No.