"Canoe and Deception Pass bridges. Much of the tidal waters behind the islands of North Puget Sound rush back and forth twice a day through this narrow passage. Deception Pass State Park displays scenic beauty with the help of Mount Baker visible on the horizon."
In the 1970s, which is when I'm betting this postcard was created, we always figured that out of the five volcanoes in our state Mount Baker was the most likely to explode, since it seemed to be frequently steaming and shaking. The 1980 eruption of Mt. St. Helens was a bit of a surprise, relatively speaking.