American TrailsTrail SpecificationsAccessible Trail Guidelines compared to sustainable trail designAccessible TrailsAmerican Hiking Society Mountain Bike PolicyCross AlertForest Service Trail Accessibility GuidelinesGeosynthetics for Trails in Wet AreasGuide to Sustainable Mountain TrailsInternational Mountain Bicycling Association Trailbuilding basicsNational Surface Trail Maintenance Management PlanOutdoors Accessibility GuidebookProfessional Trailbuilders Association brochureProfessional Trailbuilders Association Resource LinksPublications on Trail Planning, Design, Construction and MaintenanceRoanoke Valley, Blue Ridge Parkway Trail PlanStream crossing standardsTrail Construction and Maintenance NotebookWetland Trail Design and Construction