The Cascade Loop Scenic Byway is a 440-mile-long (710 km) National Scenic Byway and Washington State Scenic and Recreational Highway encircling the North Cascades in the U.S. state of Washington. It follows eight different numbered highways: US 2 from Everett to Sunnyslope; US 97 Alternate from Sunnyslope to Chelan; US 97 from Chelan to Pateros; SR 153 from Pateros to Twisp; SR 20 from Twisp to Coupeville; SR 525 from Coupeville to Mukilteo; SR 526 from Mukilteo to Everett; and I-5 in Everett