I missed that dang switchback both days...up and down the second. It is very confusing and to tell the truth I was staring at the feet of the runner in front of me when it happened. Just followed right along when they "got lost" and we went up and around that boulder...saving a whopping 10' of overall distance. Noticed it after the fact and actually stopped and cussed both directions on Sunday because I couldn't believe I made the mistake...again! There needs to be some of those flags used at this location next year to mark the trail.