Video: Tower runners invade Stratosphere

For the sixth time, runners raced up the 1,455 steps of the Stratosphere to benefit the American Lung Association on Sunday.

The course record is a little more than seven minutes. No one came close to that record out of the roughly 600 runners who took part in Scale the Strat.

Tower running is a blossoming sport with the Stratosphere event becoming one of the premier races in the world.