Commonwealth Avenue, a broad, curving road originally called Newton Boulevard, received an upgrade with the arrival of the Commonwealth Avenue Street Railway in 1895. Home construction soon followed. Join us for a look at the early streetcar line, a few architectural gems, and Boston Marathon history with author Paul Clerici on our approximately 1.5 mile route up and down part of Heartbreak Hill. Registration, $20 per person, $15 for Historic Newton members, is required. Rain date: Thursday, June 29. Register here.