The Indian Heaven volcanic field is located between St. Helens and Adams and within the Indian Heaven Wilderness. Its principal feature is an long linear zone of shield volcanoes, cinder cones, and flows with volumes of up to with the highest peak, Lemei Rock. The shield volcanoes, which form the backbone of the volcanic field, are located on the northern and southern sides of the field. Mount St. Helens and Mount Adams are on the western and the eastern sides.