The White Mountains and Springerville Volcanic Field of eastcentral Arizona contain a variety of spectacular geologic features (Figure A). Because of the relatively sparse vegetation over much of this area, most of these features are easy to recognize and photograph. Similar features occur throughout much of the western United States. Others are common in all of Earth's volcanic fields. This booklet is your field guide to the geology of this spectacular mountain landscape. It is a hiker's guide; excursions on foot to the geologic features described are encouraged. This book is written for the visitor who has an interest in geology, but who may not have had formal training in the subject. It may also help assure that the visiting geologist does not overlook features in the area.