Pro skier Cody Townsend is on a mission right now to ski all 50 lines in the 2010 book Fifty Classic Ski Descents of North America. He’s one year and 20 lines into what he hopes is a three-year project, and he’s learned a ton so far. Townsend isn’t the only skier attempting all 50. Utah ski mountaineer Noah Howell has been at it for decades and has currently done 30 of the descents. Some of the lines in the book feel practically impossible due to their remote and challenging terrain, while others are literally disappearing due to climate change and rockfall. But a few are pretty attainable for the rest of us—albeit if you have proper backcountry-skiing experience and avalanche training. We asked Townsend and Howell for their input on the most doable lines in the book. Here’s what they recommended.

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