State Route 20, Washington

The North Cascades Scenic Highway (State Route 20) is a breathtaking 127-to-140-mile route through Washington’s North Cascades National Park and Okanogan-Wenatchee National Forest, connecting Sedro-Woolley to Winthrop. Open seasonally, it features towering peaks, turquoise glaciers (like Diablo Lake), and dense forests, offering premier access to hiking and mountain scenery.