Step it up and Scale the Strat (all 108 floors) in Vegas

There are mountain climbers. There are social climbers. And then there are Scale the Strat stair climbers — those who willingly climb to the top of the iconic Stratosphere Tower.

Yes, that Stratosphere Tower, the tallest building in Las Vegas and the highest observation tower west of the Mississippi River at 1,149 feet, 108 floors and 1,455 steps.

Registration is now open to climb those steps during the the sixth annual Scale the Strat event at the Stratosphere Casino, Hotel & Tower.

The charity event — which raises funds for the American Lung Association — begins with a staggered shotgun start at 8 a.m. on Sunday, March 2, 2014.

A climber scales the Strat. (Photo by Marc Paulus)

“Scale the Strat is becoming one of the premier stair climbs in the country,” said Stratosphere General Manager Paul Hobson in a press release. “We are proud to support and partner with the American Lung Association in Nevada in its fight against lung disease.”

For some the extreme stair climb is a fitness challenge while others are motivated to compete for awards or to simply come out and support lung health. Last year, 560 people committed to the “vertical road race,” raising $175,000.

A practice climb will take place in January 2014, allowing participants a chance to step up their training by climbing about 10 to 12 flights of stairs.

To register, visit Registration is limited and participants must be at least 18 years of age or older. Those who sign up before December 15, 2013 will receive a registration discount.