The Jemez Mountains Trail Runs has gained a reputation as a very difficult course. The course is on technical trails with a substantial amount of elevation change. The 50k and 50 mile events include extremely steep climbs and descents on very technical terrain. On the course, runners will experience high altitude (from 7,000 to over 10,000 feet above sea level), fallen trees, and other obstacles. In past years, runners have experienced weather extremes including heat, cold, rain, hail, snow, extreme lightning and wind. Runners are encouraged to consider their comfort level on this type of terrain and weather before registering. All course will remain the same as since 2021. In 2021 the 50 mile course route was 2 miles longer than previous years (~53 miles).