Ultra/Trail Sites
American Ultrarunning Association
Race Result Sites
RealEndurance.com (by Gary Wang)
Clubs/Organizations
Arkansas Pikes Peak Marathon Society
Hill Country (TX) Trail Runners
Tulsa Area Trail / Ultra Runners
Individuals
David Horton (Extreme Running)
Robert Mathis (Ultrarunner.net)
Publications
Other Running Sites
Arkansas Outside (Multi-sport coverage)
Gear and Supplies