They're raising money for the Scott Firefighter Stairclimb on Sunday, March 10th.
Boise Fire has a team of nearly 30 firefighters traveling to Seattle for the event.
They'll climb 69 flights in full combat gear to raise money for the Leukemia & Lymphoma Society.
More than 290 fire departments across the nation take part.
The Boise Fire Department is the top fundraiser to date - with $22,000 and climbing!