Brookline’s biggest party of the year is next weekend, and it plans to be bigger than ever.

Lisa Paradis, director of recreation for the town, said the third annual Brookline Day at Larz Anderson Park on Sunday, Sept. 14, will look a lot like last year’s version, with some additions.

The popular 5K race and kids 1K from last year remain part of the festivities, and the event will still feature plenty of activities for kids, such as an inflatable obstacle course and bounce houses, face painting, as well as a rock-climbing wall and bungee jump.

But the list of vendors just continues to grow, said Paradis. In just two years, that number has gone from 80 to 120.

One of the biggest changes was starting a dedicated website for the event, brooklineday.org. Visitors can find information about transportation, parking, and what to expect at Brookline Day by visiting the site.

Paradis expects about 300 to 400 runners for the 5K, which starts at 9:30 a.m. (a kids’ 1K starts at 9 a.m.). Those interested in running can register on the website. The bulk of Brookline Day activities will take place from 11 a.m. to 3 p.m.

Overall, she said the town is expecting between 6,000 to 9,000 visitors at Brookline Day.

There will also be food trucks at the event, as well as food from Juliana’s Catering.

Paradis also addressed the shuttle issue from last year, in which one bus failed to stop at Town Hall at 11:30 a.m., leaving a handful of residents to wait for roughly an hour.

“It’s important to let people know that we know we had a shortage of transportation in the Village, so we doubled up our buses,” she said, adding that the event will have eight vehicles — seven buses and a minibus — circling the town in loops, as well as more bus stops. “We listened to what people had to say.”

There will also be parking spaces available at the Greek Orthodox Cathedral on Goddard Avenue, Dexter School on Newton Street, as well as Beaver Country Day School on Hammond Street and Baker School on Beverly Road. The town will be providing shuttles from those locations to Larz Anderson Park.

Visitors to Brookline Day can expect to see bands, as well as competitons such as pie-eating contests and trivia. There will also be a mini Town Hall for residents to meet some government officials and employees.

Paradis said Brookline Day has grown quickly, and she’s excited for the 2014 version.

“It’s an opportunity for people to come together at a great event,” she said.