Tamanowas Rock

Tamanowas Rock is a massive stone formation that rises approximately 150 feet above the surrounding forest, with caves, crevices, and moss-covered surfaces throughout. The rock sits near Anderson Lake State Park and displays layered geological features shaped by ancient volcanic activity.

The site held importance for people over 10,000 years ago, who used high vantage points to hunt game in the surrounding lands. It later provided refuge when a major tsunami struck the coast in 1700.

This location holds deep meaning for the Jamestown S'Klallam people and served as a gathering space for Coast Salish communities across many generations. Visitors walking through the area can sense the spiritual importance this rock has maintained for local indigenous peoples over time.

To reach this location, head east on Anderson Lake Road from Washington State Highway 20 and follow the marked trails that lead directly to the formation. The site is best visited during daylight hours when paths are clearly visible and safe to walk.

This formation is composed of volcanic material that originated during the Eocene epoch, making it a rare geological type in the region. The distinctive composition of this ancient rock is noticeably different from other stone formations found elsewhere in Jefferson County.

Location: Jefferson County

GPS coordinates: 48.02208,-122.79339

Latest update: December 12, 2025 09:03