Non-formal education programs, such as summer camps, offer opportunities for immersive learning and increased experiential science. Summer camps at the Chesapeake Bay National Estuarine Research Reserve in Virginia provide hands-on marine science experiences for 1st-8th grade students. This article assesses the short-term learning gains and long-term impacts of attending a marine science summer camp. Across all age groups, there is evidence of short-term learning, high numbers of new experiences for campers, and increased scientific confidence in many campers. The longitudinal study revealed that these impacts may last until at minimum college, influencing career choice, extracurricular activities, and course enrollment.