Troy Scott Parker is principal of Natureshape LLC, a trail planning, design, and education firm based in Boulder, Colorado. He’s the author of Natural Surface Trails by Design and is known for his ability to integrate trail aesthetics in practical design. His current project is the development of trailshaping, a system for understanding all trails and trail types based on specific forces that shape them, and which shape—and are shaped by—trail planning, design, construction, maintenance, and management. Trailshaping structures and explains how well-seasoned trail experts determine what to do in any given context, enabling people to rapidly develop their own trail expertise. His clients include the National Park Service, U.S. Forest Service, state parks, local governments, developers, The Nature Conservancy, and other nonprofits.