Rainer Hertrich is a skier and snowcat driver at Copper Mountain, Colorado, where he has lived for 33 years. He was born in Düsseldorf, Germany, and grew up in Estes Park, Colorado, at the gateway to Rocky Mountain National Park. From 2003 to 2012, he skied every day for 2,993 consecutive days, beating the longest streak on record by more than seven years. Coauthor Devon O'Neil is a freelance journalist in Breckenridge, Colorado. His work appears regularly in Outside, SKI, Powder, and Backcountry magazines, as well as on ESPN.com.