The Monte Sano Trail Run takes place in Huntsville, Alabama and has 15K and 4 mile distance options. It is part of the XTERRA Trail Run Series, which features runs across the country, ranging from 5km fun runs to 60km tests of trail endurance. The Series is grouped into geographic regions and each region has anywhere from three to ten races that runners can compete in and accumulate points towards their regional championship. Regional Champions are awarded free entry into the XTERRA Trail Run National Championship, an off-road half-marathon held in September in Ogden / Snowbasin, UT. Then comes the showdown in paradise where the best meet the best at the XTERRA Trail Run World Championship in December on the island of Oahu, Hawaii.