What Trailbuilders Mean by Sustainable Grade and Why It Matters
Maintaining a trail grade under 10% prevents erosion—but what happens when the terrain fights back and the Half Rule is broken? The answer shapes every sustainable path forward.

Maintaining a trail grade under 10% prevents erosion—but what happens when the terrain fights back and the Half Rule is broken? The answer shapes every sustainable path forward.

Dry trails: biking and hiking erode about the same (0.11 tons/acre). Sustainable design cuts erosion up to 99%. See what really causes trail damage.