Washington has a majority of the very highest volcanoes, with 4 of the top 6 overall, although Oregon does hold a majority of the next highest peaks. Even though Mount Rainier is the tallest, it is not the largest by volume. Mount Shasta in California is the largest by volume, followed by Washington's Mount Adams. Mount Rainier is thus the 3rd largest by eruptive volume. Below is a list of the highest Cascade volcanoes: