St. Patrick’s Day is still more than a week away, but festivities for the Irish holiday are rolling out this weekend. That means parades, parties and other events that could lead to traffic disruptions.

Most notably, Washington, D.C. and Annapolis will hold their St. Patrick’s Day parade on Sunday.

Here’s what to look out for.

Nation’s St. Patrick’s Day Parade

The parade is Sunday from noon to 3 p.m. and runs along Constitution Avenue from 7th to 17th Streets NW.

There will be the following street closures:

Early closure 9 am to 3 pm

-4th and 7th Street between Constitution Ave. NW and Independence Ave. SW

Closures from 11:45 a.m. to 3:30 p.m.

-Constitution Ave NW from 6th St NW to 23rd St NW

-9th Street between Pennsylvania Ave NW and Constitution Ave NW

-10th Street between Pennsylvania Ave NW and Constitution Ave, NW

-12th Street between Pennsylvania Ave NW and Independence Ave SW

-Access to 12th Street Tunnel from I-395 ramp SW

-14th Street between Pennsylvania Ave NW to Independence Ave SW

-14th Street Bridge (inbound) all traffic sent to I-395 freeway SW

-15th Street between “E” Street to Constitution Ave NW

-17th Street between New York Ave NW to Independence Ave. SW

-19th Street between “E” Street to Constitution Ave NW

-Virginia Ave between 20th Street to Constitution Ave. NW

6th Annual Annapolis St. Patrick’s Day Parade

This is a big one, with more than 100 floats. Organizers said they are expecting record crowds.

The Annapolis St. Patty’s Day parade starts at 1 p.m., but we can expect floats to be lining up by late morning. It will also be several hours before the parade is completely over and roads will be back open.

The parade route is as follows:

-Amos Garrett Blvd and then a right turn onto West Street.

-Clockwise (the wrong way) around Church Circle and out Main St.

-Down Main Street towards Randall/Compromise Circle.

-Clockwise (the wrong way) around Randall/Compromise Circle.

-Exit traffic circle via Randall Street

It’s best for drivers to consider avoiding downtown Annapolis altogether for much of the day Sunday. It will be very difficult to navigate anywhere near West Street and parking will be limited.

Here’s a look at other St. Patrick’s Day festivities this weekend.

Gaithersburg St. Patrick’s Day Parade - Saturday at 10 am. Starts at the Rio Washingtonian Center. Look for traffic disruptions along Washingtonian Boulevard near the center. Rio Boulevard will close at 7:30 a.m. (Parade Map.)

Arlington Shamrock Crawl - Saturday, 1-9 pm. Look out for as many as 3,000 festive revelers heading to at least nine bars in Arlington. Registration is at the Clarendon Grille.

Four Courts Four Miler - Saturday, 9 am-12 pm - Be aware of several thousand runners through Rosslyn and Route 110, finishing up at the Four Courts Pub.

Ireland on the Wharf Festival - Saturday, 2-6 p.m. - There will be a lot of activity on the District Pier and 7th Street Park in Southeast D.C., with bagpipes, live music, dancers, etc.