Where exactly is heartbreak hill on the Boston marathon s?

Heartbreak Hill is located around the 20-mile mark of the Boston Marathon, specifically in the Newton area. It is one of the series of hills that runners encounter in the later stages of the race, but it is the most famous due to its challenging ascent and its timing in the marathon. The hill rises approximately 88 feet over a half-mile stretch, making it a significant test of endurance for runners.