Brookline Recreation and anchor sponsor Brookline Bank have teamed up to bring residents the 4th annual Brookline Day.

This year’s celebration, happening this Sunday, Sept. 20, from 11 a.m. to 3 p.m., will again be held at beautiful Larz Anderson Park, in the athletic fields on Goddard Avenue. Parking at Larz Anderson will be limited, so attendees are encouraged to bike, walk, or take one of the buses or shuttles that will be picking up and dropping people off at convenient locations around Brookline.

Brookline Day is free and family-friendly, with lots of activities for kids, including lawn games, an inflatable obstacle course, bouncy house, and Touch-a-Truck (including vehicles from the Brookline DPW, Fire and Police departments.) There will also be a balloon artist, face painter, and glitter and henna “tattoo” artists. Kids ages 5 to 10 are encouraged to participate in the Brookline Day 1K road race. Kids 11 years old and up can run in the adult 5K race. T-shirts and goodie bags will be distributed to the first 400 runners.

There will be plenty of fun for the adults as well, including the 5K-road race, rock climbing wall, bungee jump, a pie-eating contest, plus a live music stage, local vendor tent and food trucks. On hand will be Juliana’s Catering, Trolley Dogs, Del’s Frozen Lemonade, Roxy’s Grilled Cheese, and JoJo’s Popcorn. You can also bring your own picnic lunch.

Live local music acts this year include the swinging rhythm and blues act, The Love Dogs; alternative rock and funk band The Quins; and the world beat sounds of Kalifa & Koliba.

Brookline Day is a rain or shine event: there will be pop-up tents and canopies to gather under should clouds threaten. But if this year’s festivities are like past years, it will likely be an ideal end-of-summer Sunday, the perfect day to spend outdoors in gorgeous Larz Anderson Park. For questions and more information, call Brookline Recreation at 617-730-2069.

—By Jennifer Campaniolo