This document provides background information on Grand Canyon National Park and the National Park Service in preparation for a centennial magazine celebrating 100 years of the park. It discusses the history of both the NPS and Grand Canyon NP. Key points covered include Theodore Roosevelt's role in establishing the national park system, the various indigenous tribes that inhabited Grand Canyon over time, and current trends affecting the park like an aging visitor demographic and infrastructure. The document outlines goals for the centennial magazine, which are to engage diverse audiences, highlight the people who shaped the park's history, and inspire involvement in the park's future.