MY GPS TOLD ME THIS HIKE WAS 11.6 MILES NOT 7.5 MILES. The elevation gain was also about 2600 feet.

Hiked down into the gulch and back up. It took a little over 5 hours. When parking at the summit, head north on the road past the gate, and immediately after the first comm tower, turn left onto the service road. When the first split comes, take a left for Lemmon Rock Trail south. Take that for the first 3.5 miles to where it splits and the train begins to go north-east, or south-west. Take the southwest route until it dead ends into Mount Lemmon Trail #5, and continue north.