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Race results are obtained from numerous sources, and should be accurate and complete, but inevitably there may be errors. In such cases please let us know. We obtained results from our archive of old ultrarunning magazines dating back to 1981, as well as too-many-to-name Race Directors. We also obtained results from race websites and other on-line sources, such as Real Endurance.com, Active.com, onlineraceresults.com, International Trail Running Association (ITRA) and UltraSignup.com. We are grateful to the running community for providing the results that populate the database, and we hope you find it useful, informative and joyful.