Geotextile Aggregate Trail Installation Guide - US Fabrics
1) The preferred gravel is 3/8” minus crusher run with fines. a) Crusher run with fines, unlike washed stone, contains natural binders. b) When combined with water and compacted it produces a solid surface that resists deformations from hiking boots and bikes. 2) Crown the finished trail surface at ¼ inches per 1 ft.