This paper examines the impact that a commitment to service learning as an integral component of outdoor learning may have on the environmental literacy of all learners. Informed by a review of literature presenting methods that educators in Sweden, Denmark, New Zealand, Australia, South Africa, and the United States have used to implement outdoor learning in their countries, this project demonstrates how pre-service teachers may be trained to develop children to be stewards of nature. To be specific, pre-service teachers participate in service learning as their college classroom is moved outdoors onto Wisconsin's Ice Age Trail (IAT). These future teachers learn to integrate multi-disciplinary literacy into outings on the trail, as they work with scientists and volunteers from across the United States to build and maintain one of only 11 national scenic trails in the country. Through service and outdoor learning, these pre-service teachers are developing their environmental literacy as they conserve one of our country's vital resources. This paper submits that by combining service with outdoor learning, we may build a culture of environmentalism in the United States and throughout the world.