Tom’s Thumb Trailhead and Long Loop Fitness Hike This Very Difficult hike explores the rugged and scenic views of the preserve. End the year with a bang as we will go up Tom’s Thumb to East End and return via the McDowell Regional Park. In 9.3 miles there is over 1,500 ft. elevation change in about 5 hours. Bring a snack or light lunch and water for the trail. There are bathrooms at the trailhead. No dogs please Arrive 15 minutes before start of hike.