Grand Pacific Glacier can actually be found in two countries. Part of the tidewater glacier is located in Reid Inlet within Glacier Bay National Park in Alaska, while the other side can be found in the Grand Pacific Pass in British Columbia, Canada. Back in the 1700s, Grand Pacific Glacier filled the entire bay, and reached all they way to the Icy Strait.
More recently, in the early 1990s, Grand Pacific Glacier joined with Margerie Glacier. However, the two separated due to Grand Pacific Glacier's rapid retreat.