Rattlesnake Ridge (sometimes called Rattlesnake Ledge or Rattlesnake Mountain) is a mountain ridge located south of North Bend, Washington, United States. The western end is near the intersection of State Route 18 and I-90 in Snoqualmie, Washington and runs southeast about 7 miles (11 km) or 11 miles (18 km) by trail. It is the highest and easternmost of the Issaquah Alps (although Cedar Butte in the gap between Rattlesnake Ledge and the Cascade front at Mount Washington is considered by Harvey Manning to be a quasi-Alp).