a. Sundown Sport and Marine was established in 1977, and has been meeting the demands of the Tri-Cities boating community ever since. We are currently nestled on the banks of the Columbia River in Richland, Washington. Sundown offers same day service, a wide range of parts and accessories as well as all of your on the water toys and sporting equipment from the best brands in the industry. Sundown is the one stop shop for all your boating needs.