- Stan Jensen's Site
Includes a list of over 100, 100-mile races in North America with calendars, schedules and other links.
- American Ultrarunning Association
The site is designed as a resource for news and information on ultrarunning in America.
- Big Island Road Runners ("Big Island", Hawaii)
Running club on the Big Island and race organizer for the Hilo to Volcano ultra.
- Kevin Sayers' UltRunR Web Site
Features links on getting started, training, coaching, clothing and race strategy.
- Ultra Running Magazine Online
Has links to races, and calendars as well as articles on how to get started and how to train for an ultra event.
- Valley Isle Road Runners (Maui, Hawaii)
Race organizers and running club on Maui.
- Mid-Pacific Road Runners Club
Race organizers on Oahu.
- Trail Runner Magazine
Trail running info from the novice to master.
- Cool Running
Cool Running is the complete online resource for runners of all ability.
- Fixing Your Feet
An e-zine dedicated to foot care skills, tips, techniques, and products.
- Fixing Your Feet Blog
Expert foot care advice for people who love their feet.