It wouldn’t be fall in Boston without the annual Head of the Charles Regatta, now in its 48th year. Rowers, individuals and teams, gather from all over the world on the shores and waters of the Charles River to compete in the world’s largest two-day regatta. With a 3.2-miles course along the river, there are plenty of locations to watch the rowers and soak in a Boston tradition.

Oct. 20-21; some viewing areas ticketed.