Pre-service teachers need experiences in practical matters as a part of field trip preparations programmes. For 14 years, a private, non-profit university in Turkey has involved pre-service teachers in field trip planning, implementation and evaluation. A programme assessment was conducted through a case study to examine the long-term effects of pre-service field trip preparation. Through a survey created for the study, teachers shared their field trip activities and reported confidence levels. The survey was administered to 44 alumni of the biology education department with a response rate of 72.7% (N = 32). This study will help researchers learn which programme areas need to be improved and can serve as a model for other institutions interested in evaluating field trip preparation programmes.