Annual steamboat meet of the Northwest Steam Society. Location is different every year, but always in the Pacific Northwest and usually on, or near, salt water. There is plenty of on-line info at the NWSS website - http://www.northweststeamsociety.org
Click on the "enter" and select the "2008 meet" button from the nav bar on the left.
For location and directions a detailed Google Map is available on the August 15 display of this event.