Skiers might not know James Niehues’s name, but they have probably studied his maps. Over a decades-long career, the 75-year-old has hand-painted trail maps for over 200 ski resorts across the U.S. as well as a few in farther-flung places including British Columbia, Serbia, and New Zealand. The so-called “Rembrandt of Snow” stumbled into his mapmaking career in 1987, shortly after moving with his wife and kids to Denver from Grand Junction, Colorado. Desperate for graphic design work, he connected with local artist Bill Brown, who in turn handed him…