Shoup Bay State Marine Park is located five miles southwest of the Port of Valdez. The primary access is by boat, although an 11-mile trail from Valdez to the park is available. The bay is famous for the 150-foot tidal wave, which supposedly surged in and out of the bay three times during the 1964 earthquake. The bay has changed substantially since then. The Shoup Glacier has receded about a mile and a half changing the terrain, exposing new land and creating a brackish lagoon connected by a tidal river. Be sure to use the USGS map of the area dated 1996, which shows these new land features.