Gateway Loop Fitness Hike from Gateway Trailhead.  Finish out our fitness hike season on the Gateway Loop that will take you into the heart of the McDowells. This Moderately difficult hike covers 4.5 miles, gains 700ft and takes about 2 to 2.5 hours. Challenging in the spring heat. Bathrooms available at the trailhead. Bring water and snacks for the trail. No dogs please.  Arrive 15 minutes before start of hike.