GeoJourney is an interdisciplinary field trip in geology, Native American studies, and environmental studies designed for introductory-level undergraduates. The program travels 23,345 kilometers by van to national parks, industrial sites, museums, and Indian reservations in 24 of the United States. During the day, students carry out hands-on projects, field investigations, and hikes. At night, campfire lectures and discussions, along with reading assignments and written exams, enhance the educational experience. Assessment of student conceptual change in the geosciences shows statistically significant improvement beyond that seen in the traditional geoscience classroom setting. (Contains 4 tables and 7 figures.)