 The highest peak in the group is Grand Teton, which rises more than above Jackson Hole valley, and is the second tallest mountain in Wyoming, after Gannett Peak.The Cathedral Group is separated by other tall peaks of the range by the Cascade Canyon to the north and Avalanche Canyon to the south.Half the remaining dozen glaciers in the Teton Range are located in this cluster of high peaks, including the Teton Glacier which is the largest one in the range.