Studies of individual environmental education (EE) field trip programs have found that pre-visit preparation and post-visit follow-up activities can enhance desired student outcomes. We examined these relationships across a broad sample of single-day EE field trip programs for adolescent youth (grades 5-8) across the United States. We measured student outcomes, reflecting environmental literacy, 21st century skills, positive youth development, and student learning, through end-of-visit retrospective student surveys and follow-up surveys with visiting teachers two weeks after the field trip. Pre-visit logistical preparation as well as both pre-visit preparation and post-visit follow-up related to the subject matter were each associated with more positive student outcomes. The study provides further evidence across a large sample of programs that pre-visit preparation and post-visit follow-up can have meaningful impacts on student outcomes for EE field trips. We discuss the implications of the findings and provide examples and guidance for future programming efforts.