We've gone to a lot of places around Washington State and Oregon, so I'd like to share with you perhaps the hardest and most challenging hike in the Evergreen State. Washington's Toughest Hike? rik mikals rik mikalsREAD MORE: 5 Hiking Trails Around The Tri-Cities That You'll LoveThis 38.1-mile multi-day route requires ice axes year-round, with crampons and climbing equipment also recommended. It's a tough hike, and you'll need to bring the right equipment, but getting this one done could be quite rewarding. You should have decent hiking experience before tackling that hike.