The Katy Trail is a monument to the pioneer spirit and US westward expansion, and a testament to Missourians’ love for their parks and outdoor spaces. Katy Trail: A Guided Tour through History is the guide every trail user needs to explore the trail and appreciate the epic role the corridor plays in the history of the state and the nation. 25% of all proceeds from katytrailtours.com will go to Magnificent Missouri, a nonprofit that conserves and celebrates the trail.​