Monday is a big day in Boston and all of New England.

Patriots’ Day, one of the biggest days of every year on the Boston sports calendar, is upon us. The state holiday is one big party, highlighted by the 120th annual running of the Boston Marathon.

Runners of all ages, shapes and sizes will make the 26.2 trek from Hopkinton to Copley Square, the culmination of months and months of training. If you want to follow along with the marathon, you can do so with the BAA’s tracking website or by watching the live stream.

When: Monday, April 18, live stream beginning at 9:15 a.m. ET
Live stream: BAA.org, NBC Sports Live Extra

Here’s how to check runners’ time, race progress >>

Thumbnail photo via Winslow Townson/USA TODAY Sports Images