The city is buzzing ahead of the 2018 Boston Marathon on Monday, April 16.
Marathon weekend is an electric time to be in the city as people travel from around the world to lace up their sneakers to participate in a Boston race.
Since 26.2 miles on Monday isn't for everyone, though, the Boston Athletic Association holds the 5K event on Saturday.
In-depth news coverage of the Greater Boston Area.
Dave McGillivray has been race director of the B.A.A. Boston Marathon for 31 years, but he also does the 5K, 10K, and half marathon.
What makes these events such a draw?
"It all comes down to the team. The B.A.A. has the most experienced team on the planet. We're very, very fortunate that that's our greatest asset, the experience of all the people that come together that pull something like this off."
The forecast for the marathon on Monday is wet and windy, but Saturday had great weather.
“We don't want to think about Monday just yet but today is a perfect day for a race and 48 degrees overcast, doesn't get better than this for a road race so we're looking forward to a good day today.”
Which event is his favorite?
“Of course, the Marathon is the crown jewel, the holy grail,” McGillivray said. “That's what runners from all over the world live for, is to come here to Boston to run on the same hallowed ground as the best runners in the world have done."
McGillivray himself has run 144 marathons, including 45 Boston Marathons.
"My main focus is the race itself and making sure the 30,000 get off on time and have a safe race. But then I've been doing it for a lot of years and always wanted to be an athlete myself so just sort of bring up the rear so I've been the last finisher for the last 30 years,” McGillivray said of his own efforts. “Philanthropy is a big part of this now. And I do my run for the benefit of the Martin Richard foundation, and there are a lot of other people out there who do it for a greater purpose, too, so all in all it's a great day."
The B.A.A. 5K has been a tradition since 2009, and many feel it's a fantastic way to kick off the weekend.
The race attracts people for different reasons.
Bonnie and Myles McCormick travelled from Nova Scotia so they could say they ran Boston.
"It's amazing to be in this city. We love this city," Bonnie said.
"We're thrilled," Myles added.
"Boston is the runner's race. It's the best race that you can do. Even though we're only doing the 5K, we are thrilled to be here and be a part of this whole weekend," Bonnie said.
“It's the mecca. It's the shrine of running. It's something you aspire to. It's something to be able to run, but it's a privilege to be able to come to Boston and to run a marathon, it's just bucket list. It's a dream. We love this city, the hospitality," Myles said.
Some are running to crush goals, like Aiden Puffer who broke the 13-year-old record.
Puffer said he's excited after putting in a lot of hard work.
"I run about six days a week usually and cross train one day, and run about 45 miles a week."
Puffer would like to finish the 5K in 13-flat someday.
Puffer's dad said the winner of the 5K men's race gave his trophy to his son.
Others are running to break boundaries like Tom Panek who is legally blind and ran with his guide dog Gus.
"Gus was my guide, he is my Guiding Eyes dog, and Scott had guided me previously through the Boston Marathon in 2015, and we actually ran part of the Appalachian Trail together, but today was a first because Gus guided me through this 5K safely. I can't see but he was able to guide me, and we're really excited that a guide dog was allowed to enter the race and show that he could help me complete it successfully.”
Panek hopes others will get out and run with their dogs.
“We have a real wish that people would get involved in running, walking or jogging with their dog. We're launching a wag-a-thon which is Guiding Eyes effort to get people out there and active with their dogs and support our organization. Get your wag on. It's a beautiful day here. I'm looking forward to Monday.”
Panek will run the Marathon on Monday, "but this was Gus's race," he said as he put the medal around his dog's neck.
The B.A.A. 5K kicked off at 8 a.m., followed by the Invitational Mile at 10:30 a.m. and the Relay Challenge at 1 p.m.