ロジャーズパス北スキーガイドブック：アップトラック、ブートパック、ブッシュワック Vol 1

Bought this for planning a spring trip and the route descriptions with uptrack vs bootpack breakdowns saved me hours of guessing. The two-part format is a bit bulky in a pack, but the beta on bushwhack exits alone is worth it.

I've been skiing Rogers Pass for years and still learned new lines from the bootpack and bushwhack sections in this third edition. The topo maps are clear enough to plan a day without hauling a second map, though a couple of the approach notes assume you already know the area.

The route descriptions for the uptracks and bootpacks are impressively detailed, with clear topo maps that actually match the terrain once you're out there. I've used a few guidebooks for this area and this third edition is easily the most thorough for planning a day in the pass.