Used by both the U.S. Forest and Park Services, this manual explains how to plan, build, design, and maintain trails.

From the leading conservation organization--the trail building and maintenance bible, now updated and expanded to meet new techniques and new realities of the 2

. Renewal of Life by Transmission. The most notable distinction between living and inanimate things is that the former maintain themselves by renewal. A stone w

"In 2009, while thru-hiking the Appalachian Trail, Robert Moor began to wonder about the paths that lie beneath our feet: How do they form? Why do some improve