Trail Building Information
Trail Design and Maintenance - a short & sweet introduction to trail building by California State Parks
Forest Service Trail Construction & Maintenance Notebook – the definitive trail building resource
IMBA's list of 10 common trail building mistakes
Trail Building Resources - loads of links & resources on trail building posted by the National Trails Training Partnership
Training Workshops and Seminars
Trail Building Training - workshops all over the country posted by the National Trails Training Partnership
Outdoor Stewardship Institute Training Calendar – training workshops in Colorado
Trail Crew Leading Resources – Some information in these is specific to the organization that produced them, but there is lots of good general information.
Pacific Crest Trail Association Crew Leadership Manual - how to manage volunteers
Crew Leader Manual - by Volunteers for the Outdoors Arizona.