If you know anything about Boston, you know it’s basically known for two things: 1) the American Revolution and 2) Sports!
The trail starts in Boston Commons and the first place you’ll want to go is the Boston Commons Visitor Center. It’s pretty easy to walk to if you’re staying in the middle of Boston, but the “Park Street” T Station (red and green lines) is also right there.
There are 17 official sites: - Boston Common - Massachusetts State House - Park Street Church - Granary Burying Ground - King’s Chapel - Boston Latin School Site
The Freedom Trail is affiliated with the National Park Service and they offer a few different tour options. There’s a Freedom Trail Audio Tour that you can access here or in the official NPS App. It has over 90 minutes of audio from 23 different stops.
I paid to go inside the Paul Revere House and the Old North Church ($5-6 each but only $1 for children) and even though we were only in each place for about 15 minutes, it felt worth it.
I think a full day is a pretty generous time frame, but if you’re a major American Revolutionary War history buff then you could easily spend longer (sometimes things are more enjoyable if you split them up over the course of 2-3 days).