Old Pueblo Endurance Runs

Old Pueblo Endurance Runs takes place in Sonoita, Arizona, on March 6, 2027. Two trail distances share a 6:00 a.m. start: a 50 Miler (80.5 kilometers) and a 25 Miler (40.2 kilometers). The pre-dawn gun is standard practice for desert ultras and gives the longer field several cool hours before the sun is high.

Southern Arizona in early March usually means cold at the start and considerably warmer by afternoon, so the smart approach is to dress in layers you can drop and to front-load your hydration before you feel thirsty. The 25 Miler is a reasonable first ultra for a runner with marathon experience; the 50 Miler asks for a longer build, with back-to-back weekend long runs, practice hiking climbs, and a tested nutrition routine. On this kind of open, rocky ground, run by effort rather than pace and accept that the splits will look slower than your road numbers.