On August 9, 2015 at about 2030 hours Zion Dispatch received a report of an exhausted man on the exit slope of the Subway Route. Two men were attempting to complete the subway form the Left Fork trailhead as an out and back hike. The one male began experiencing some muscle cramping at the Subway formation (approx. 4.5 miles from the trailhead). The patient and his hiking partner worked their way back toward the trailhead but, about halfway up the steep scree slope exit route, the patient was unable to continue. At this time the patients hiking partner hiked up the rest of the scree slope and phoned dispatch.
A 3 member SAR team responded to the Left Fork trailhead. A medic and an EMT hiked in with medical supplies and overnight gear, the 3rd rescuer remained at the trailhead to act as radio relay. The SAR team reached the subject at about 0030 hours on August 10th and determined that the subject was unable to continue hiking that night due to cramping and exhaustion. They spent the night with the subject providing food, water and overnight equipment. In the morning the subject was able to walk out under his own power. All units were clear by 1000 hours on August 10th.