Issaquah Creek is a small stream flowing through the city of
Issaquah and nearby communities, in the
U.S. state of
Washington. Its
headwaters are on the slopes of
Cougar,
Squak,
Tiger, and Taylor mountains in the
Issaquah Alps. Tributaries of Issaquah Creek include Holder Creek, Carey Creek, Fifteen-mile Creek, McDonald Creek, East Fork Issaquah Creek, and North Fork Issaquah Creek. The creek empties into the south end of
Lake Sammamish. The lake's outlet is the
Sammamish River, which in turn empties into
Lake Washington and ultimately
Puget Sound.