In the beginning, there were 254 runners toiling up and over the hills of Middle Road.

As 1,500 runners anxiously milled about the starting line on Middle Road Saturday Morning, West Tisbury selectman Jeffrey (Skipper) Manter brandished a streamer-topped car antenna, holding it up to the sky.

“In case I need to wave down a med-flight,” he told curious fellow runners in the 34th Chilmark Road Race.

The sweat-soaked Mr. Manter had already run the course that morning in preparation for a half-marathon in Lowell and was beginning to feel the miles.

“Stay in front of me and you’ll be all right,” he said.

The Chilmark Road Race is about much more than speed. How many contests pit septuagenarians against seven-year-olds? How often do you see Crocs on the starting line? Where else do people doing a 20-minute mile get such an enthusiastic round of cheers?

When Hugh Weisman organized the first annual Chilmark Road Race some 32 years ago, he wasn’t exactly sure how many people would show up. Mr. Weisman, an avid runner who at the time was offering a clinic at the Chilmark Community Center, estimated beforehand that 200 runners might show up.

Maybe more, maybe less.

But he never imagined that the little race, stretching over five kilometers along Middle Road, would grow to become the phenomenon it is now.

Susan Wilson is a runner. She runs everywhere she goes — Egypt, France, Viet Nam, England, her home in Princeton, N.J. and Chilmark. They’re all good places to accelerate her body past a walk. In fact, at 78, she was the fastest female in her age category in Chilmark Road Race last Saturday. She has won that honor 11 times, in her 60s and her 70s.

With the sounding of the horn, some 1,600 runners in the 31st Chilmark Road Race took off. The herd shot toward the press truck like raptors in a Steven Spielberg film and the red pickup sped up to avoid being overtaken. John Ciccarelli was at the front, his face just feet from the photographers’ lenses. Behind him two boys in pink shirts attempted a 100-meter dash in the beginning of the 3.1-mile race and soon dropped off to the side.