Flash floods are common and the trails can get altered almost to the point of being impassable.
Upper Helldorado winds up a canyon that funnels water from the La Sal Mountains down a chute, barely wider than a Jeep. Major erosion is common in this trail and the difficulty rating can change dramatically from storm to storm. We took our local group through Lower Helldorado first, which proved to be getting easier by the day. Upper Helldorado, on the other hand proved to be very washed out, which resulted in a 4 foot deep hole in the middle of an already tough section. The hole made for some very technical terrain and a lot of fun.