The 116th Boston Marathon’s registration process opened today.  It is the world’s oldest annual marathon and ranks as one of the world’s best-known road racing events. It is one of five World Marathon Majors (the other four comprised of Berlin, Boston, Chicago, London, and New York City). The course runs through 26.22 miles (42.195 km) of winding roads, following Route 135, Route 16, Route 30 and city streets into the center of Boston, where the official finish line is located at Copley Square, alongside the Boston Public Library. For this reason, the MBTA suspends service to the Copley Square stop for…