Background: As a psychological construct, inspiration has not received extensive examination in the outdoor literature. Inspiration can be characterized in terms of evocation, motivation, and transcendence. Purpose: This qualitative study explored the experience of inspiration in response to natural landscapes utilizing Bergson's qualitative multiplicity, the experience of co-occurring heterogeneous elements. Methodology/Approach: Survey respondents participated in a traveling field course visiting 19 U.S. National Parks in 2015 (n = 15, 26 days) and 14 parks in 2017 (n = 15, 18 days). Respondents described inspirational experiences in each park. Findings/Conclusions: Qualitative analysis of responses revealed a characteristic pattern: landscape features, landscape qualities, and affective responses. Participants cited vertical features, vastness, and beauty as triggers of inspiration, and characterized inspiration in terms of awe, wonder, and sublimity. Implications: This study describes inspiration in the outdoors, with implications for planning direct experiences of natural landscapes to maximize inspiration.