The case study presented in this article is an example of an implementation evaluation. The evaluation investigated significant components of the implementation of a long-term environmental educational program. Direct observation, evaluation-specific survey data, and historical data were used to determine program integrity as identified by adherence to original expectations, dosage, quality of delivery, participant responsiveness, and differentiation from other programs. The evaluation provided key information for replicating and expanding a successful program and exploring areas in which positive changes can be made. The article illustrates how the evaluation methodology that was applied can be useful for other Extension programs.