Course

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 the day, and runs increased service to the general area. The race runs through eightMassachusetts cities and towns: Hopkinton, Ashland, Framingham, Natick, Wellesley, Newton,Brookline, and Boston.

The Boston Marathon is considered to be one of the more difficult marathon courses because of the Newton hills, which culminate in Heartbreak Hill near Boston College. While the three hills onCommonwealth Avenue (Route 30) are better known, a preceding hill on Washington Street (Route 16), climbing from the Charles River crossing at 16 miles, is regarded by Dave McGillivray, the 2007 race director, as the course’s most difficult challenge.  This hill, which follows a 150 foot drop over the course of one half-mile, forces many lesser-trained runners to a walking pace.

Heartbreak Hill

Heartbreak Hill is an ascent over 0.4 mile (600 m) of the Boston Marathon course, between the 20 and 21 mile marks, in the vicinity of Boston College. It is the last of four "Newton hills", which begin at the 16 mile mark. The Newton hills confound contestants (out of proportion to their modest elevation gain) by forcing a late climb after the downhill trend of the race to that point. Heartbreak Hill itself rises only 88 vertical feet (27 m), from an elevation of 148 feet at the bottom to an elevation of 236 feet at the top, but is positioned at a point on a marathon course where muscle glycogen stores are likely to be depleted—a phenomenon referred to by marathoners as "hitting the wall".

The nickname "Heartbreak Hill" originated with an event in the 1936 race. On this stretch, defending champion John A. Kelley caught race leaderEllison "Tarzan" Brown, giving Brown a consolatory pat on the shoulder as he passed. His competitive drive apparently stoked by this gesture, Tarzan Brown rallied, pulled away from Kelley, and went on to win—in the words of Boston Globe reporter Jerry Nason, "breaking Kelley's heart."