 | | | Represents and Promotes Trail and Mountain Running
| | | | AUA is the duly-authorized USA member organization of the International Association of Ultrarunners (IAU) | | | | The place to find trail ultras in the USA, Canada and several other countries | | | | A very complete and user friendly calendar arranged by date | | | | "Beyond the Marathon" International Competition
| | | | Tom Perry's observations of the six events in the Western New York Ultra Series | | | | The premier national organization dedicated to promoting the development and growth of running clubs
| | | | Global Ultramarathon Races & Events
| | | | UltraRunning Matters Yahoo! Group site - requires no membership fee | | | | | | | | | | | | Find out what might be injured. See muscles in relation to other muscles, their origin and insertion, and the action that the muscle performs. |
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