Travelers are voting Glines Canyon Dam as the best dam in Olympic National Park. There are 1 dam near Sequim a city just 30 km from Olympic National Park and 1 dam near Sedro Woolley which is 82 km distant. The most popular of these are Glines Canyon Dam near Sequim and Upper Baker Dam in Sedro Woolley. You can find 6 dams in Washington and 135 dams in the country of United States. Our members favorite in Washington is Grand Coulee Dam and Hoover Dam is the top pick in United States. Want more? Check out our map of dams in Olympic National Park.