National Ultra Endurance Series announces 2015 calendar

The ninth annual National Ultra Endurance (NUE) Series will host 13 events across the US this year starting at the True Grit Epic in St. George, Utah on March 14. New this year will be one international venue held toward the end of the series at the Rincon de la Vieja Challenge held in Liberia, Costa Rica on August 22, for a total of 14 events in 2015.