More than 300 people including firefighters and fitness buffs climbed to dizzying heights in Vancouver on Sunday for lung health.

It was the 15th annual Climb the Wall: The Stairclimb for Clean Air, which is a fundraiser for the BC Lung Association.

Participants — including firefighters in full gear — must run or walk up all 48 flights of the Sheraton Vancouver Wall Centre. The total number of steps is 739.

To participate, each stair climber must raise a minimum of $125 with all proceeds supporting lung research, education, patient support and advocacy programs.

5 things to know about Climb the Wall

Age of participants ranged from nine to 80.

Over the past 15 years, the event has raised more than $1.5 million.

Average stair climb time is 10 to 15 minutes.

Team <a href="https://twitter.com/501stLegion">@501stLegion</a> <a href="https://twitter.com/Outerrim501st">@Outerrim501st</a> getting ready for <a href="https://twitter.com/hashtag/climbthewall?src=hash">#climbthewall</a> for <a href="https://twitter.com/BCLungAssoc">@BCLungAssoc</a> <a href="https://t.co/3kDwGEtZvN">pic.twitter.com/3kDwGEtZvN</a> —@dolphinaphinity

This was Jack's 10th Stairclimb - thanks all our veterans! You rock! <a href="https://t.co/HupRKHcVub">pic.twitter.com/HupRKHcVub</a> —@BCLungAssoc