A clear, warm day greeted 34-year old Steven Boyton as he stepped up to the starting line of his debut marathon Sunday at the Colorado Marathon in Fort Collins. It was his third attempt at a marathon — the previous two had been thwarted by pre-race injuries. He was able to channel his experiences not to just run, but to win the race soundly. “At first it felt surreal,” said Boyton. “It means so much because of what it’s taken to just get to the …