Photos 14, 15, and 16 were made by Sarah Pepper (pictured).
001_Devils Tower_7543002_Devils Tower_7548003_Devils Tower_7560004_Devils Tower_7584005_Devils Tower_7601006_Devils Tower_7615007_Devils Tower_7617008_Devils Tower_7621009_Devils Tower_7634010_Devils Tower_7670011_Devils Tower_7686012_Devils Tower_7695013_Devils Tower_7762014_Devils Tower_8160015_Devils Tower_8163016_Devils Tower_8164