Gateway to TT9 Overlook Fitness Hike at Gateway Trailhead This difficult hike takes us to the seldom visited vistas west of Tom’s Thumb that makes you think you are in the Grand Canyon. A climb of 2,100 ft. Location: Gateway Trailhead – 18333 North Thompson Peak Parkway, Scottsdale, AZ 85255 Skill level: Difficult Distance: ~9.6