The Sourdough Mountains, also called Sourdough Ridge,[1] is a mountain ridge on the northeast side of Mount Rainier in Mount Rainier National Park, Washington, United States. The range forms an L-shape, starting at Mount Fremont, running east to Dege Peak, turning north to Slide Mountain.
The ridge is a popular hiking destination, due to the excellent view of Mount Rainier and its proximity to roads and the Sunrise Visitor Center.
. Fred Beckey . Cascade Alpine Guide
Climbing and High Routes: Columbia River to Stevens Pass
. 3rd . 2000 . . 978-0-89886-577-6 . 136.