At just 15 seconds each, Erik Walton's night sky time lapse videos of Bridger Bowl and Big Sky Resort are some of the coolest we've seen yet. Groomers? Check. Falling stars? Check. Nice work, Erik!

According to Erik Walton's VIMEO notes:

A short time lapse of stars to star trails over Lone Peak, Big Sky, Montana. Shot over 2 hours with a Canon 5D Mark II. 30 seconds, f/2.8, 5000 ISO at 35 second intervals.

Here's his video of Big Sky Resort:

Here's his video of Bridger Bowl: