Lower Lewis Falls Location: Skamania County, Washington Best Time to Go: In the summer, season is from April-November. Scenery: Several Waterfalls, Lewis River, and forest. Comments: One of my favorite hikes. The hike is pretty easy, and mostly flat. Around 5 miles out, and back. The views are amazing. Lower Falls (my favorite) cascades of from high cliffs into the river below. Northwest Forest Pass Required.