Gateway Loop Fitness Hike at Gateway Trailhead Finish out our fitness hike season on the Gateway Loop that will take you into the heart of the McDowell Sonoran Preserve. Elevation gain 700 ft. Challenging in the spring heat. Location: Gateway Trailhead - 18333 N. Thompson Peak Pkwy. Scottsdale, AZ 85255 Skill level: Moderate Distance: ~4.5