Agate Pass or Agate Passage is a high-current tidal strait in Puget Sound connecting Port Madison and mainland Kitsap County. It lies between Bainbridge Island and the mainland of the Kitsap Peninsula near Suquamish. It leads south towards Bremerton, extending about one mile (1.6 km) in a straight, southwesterly direction. The depth is about 20 feet (6.1 m). The shores are wooded and fairly steep. The shoreline is mostly rocky and fringed with kelp to Point Bolin.