Only in Colorado would you see people celebrating Tube to Work Day - and taking it very seriously.

Tube to Work Day, coming up on its ninth annual year along Boulder Creek, is scheduled for Friday, July 15, at 8 a.m. at Eben G. Fine Park near Third Street and Canyon Boulevard in Boulder the Daily Camera reports.

The event, which started out with 2 friends tubing to work in 2008 and has since become a summer staple in Boulder, is run on a BYOT basis (bring your own tube) and you'll need to wear a helmet and wetsuit along with your business attire of choice.

To see photos of the actual event, check out the event's Facebook page.