Halloween weekend brings about Ubethons’ race + costume content + obstacle event extravaganza known as the Halloweenathon. On a mild Saturday morning, several hundred participants showed up to race a 5K or 10K or to run/walk a 2.5K or 5K fun run. And to show off their costumes for the costume contest! I’ve been running this race since its beginning in 2011, when it was known as the Monster Moon Run/Trick-or-Treatathon/Run for Your Bones, and…