Fifty years ago, the New York City Marathon ran through all five boroughs of the city for the first time. There were just over 2,000 competitors in that seventh running of the race, including only 88 women. Now about 60,000 runners will step up to the starting line Sunday with nearly half of them women. Bill Rodgers, a year after winning the Boston Marathon for the first time, won in the debut of the five-borough course and is the only man to win the event four times, from 1976-79. Rodgers says “it was so different as we were used to running in Central Park.”