Hidden deep in the Willamette National Forest, Tamolitch Blue Pool is a 3.6–4 mile round-trip hike that rewards you with a glowing, crystal-blue pool where the McKenzie River bubbles back to the surface through ancient lava rock. The water is so clear it looks drinkable—yet stays a frigid 37 °F year-round, making swimming and cliff-jumping risky. Expect mossy trails, lava fields, and jaw-dropping views that make this one of Oregon’s most photogenic hikes. Go early to beat the crowds and soak in the magic.