This article presents the evaluation of the Sustainable Big Bend Green Living Expo and Education Fair, which targets participants with a variety of learning opportunities. Evaluation was carried out using onsite surveys along with follow-up surveys and phone interviews. Results indicate that a 1-day sustainability event is a meaningful way to reach individuals and that they have high levels of satisfaction, learning, and self-reported behavior change. The study concludes that Extension has a critical role to play in sustainable living issues and that systematic evaluation can be valuable for program improvement as well as documentation of outcomes.