Saturday's event was planned as a double celebration for bicyclist Kristin Armstrong's second Olympic gold medal and her 39th birthday.
Her fans couldn't be happier.
"It was a lot of fun," a bicyclist named John said at Capitol Park. "A lot of kids, a lot of families and bike riders, just a fun thing to do on a hot afternoon and celebrate Kristin's win."
The celebration began with fans joining Armstrong in a "Victory Ride" from the Boise Depot down Capitol Boulevard.
Despite the heat and the mile-long ride, fans eagerly followed Armstrong to the big party finish at Capitol Park.
City officials anticipated thousands attending the big celebration, so in honor of Armstrong's birthday, they offered up cake to the first one thousand fans.
"Kristin Armstrong is not just a world class athlete that happens to live in Boise, she's family, she's part of who we are," said Boise Mayor Dave Bieter.
For Armstrong, Saturday afternoon was an opportunity to bring her London win home to Idaho and remind thousands of fans they've been part of this long, Olympic journey every pedal of the way.
"You know, 22 months ago we had this vision," Armstrong said. "My coach and my husband. What do you think of making a comeback? We talked about it. My vision was having Lucas on the podium with me."