Trail Running
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- Australian Ultra Runners' Association
- Seeks to promote ultramarathon running in Australia. Provides a race calendar, results, news, and links.
- 22
- Endurance Planet
- Podcasts related to endurance sports including ultrarunning, cycling, triathlons, and adventure racing.
- 23
- EnduranceBuzz.com
- Exploring trail running and ultramarathons in the south Midwest United States. Includes training articles, race and gear reviews and regional race guide.
- 24
- Extreme Ultrarunning
- Resources, links, and general information. Includes runners' profiles, calendar, photographs and race reports.
- 25
- Get Ultra Running
- A resource for ultra runners and those wanting to go beyond marathon distance for the first time.
- 26
- International Association of Ultra Runners
- Provides organizational information, newsletters, race listing and coming events, training tips, and links. English and Chinese versions.
- 27
- Kansas Ultrarunners' Society
- Includes event descriptions, member biographies, pictures, newsletters and membership information.
- 28
- Kevin Sayers UltRunR Site
- Resources and opinions on topics ranging from training and racing tips to equipment recommendations.
- 29
- New York Ultra Running
- Contains details about races in the area, highlights, pictures, directions, and membership details.
- 30
- North Texas Trail Runners
- Information on trail running and ultra running in North Texas. Features calendar listings and a news/opinion section.
- 31
- Run100s (Run Hundreds)
- Stan Jensen's ultramarathon guide, especially focusing on 100 mile events and others in northern California. Includes information and statistics for the top races in the USA, personal achievements, and goals.
- 32
- Sri Chinmoy Marathon Team
- Organiser of ultrarunning events in more than 30 nations, including the world's longest certified race of 3,100 miles in New York. News, photos, race information and results.
- 34
- Trailrunners.net
- Collection of race reports from two ultramarathon runners in the San Francisco Bay area.
- 35
- UltraRunning
- US based magazine offering calendar of events, articles on nutrition and training, news and results.
- 36
- UltramarathonRunning.com
- Ultramarathon running races, training and information for ultra running enthusiasts. Trail, mountain, desert, 24 hour and other long distance endurance events.
- 38
- iRunFar.com
- Blog with race reports, shoes and gear reviews, training tips, ultramarathon and trail running news.