Building nature trails requires artistry and design, "These trails do not emerge naturally (as some might imagine) from regular use. In fact, their “natural” appearance is the byproduct of extremely conscientious design," Kurt Kohlstedt reports for 99% Invisible. Kelly Kate Warren works for California Conservation Corps and builds trails as a large part of her work. "Trail construction often “…boils down to keeping water off the trail," Warren says in Kohlstedt’s report.
These trails serve many different groups, "Routes must factor in cyclists, cross-country skiers or horseback riders with different needs and levels of impact," Kohlstedt says.