Marcus Landslide Educational Hike at Tom's Thumb Trailhead Location: Tom’s Thumb Trailhead - 23015 N 128th St, Scottsdale, AZ, 85255 Skill level: Moderate Distance: ~4 miles Time: ~3 hours Open your eyes to the Marcus Landslide geological site, the second largest landslide in Arizona. Elevation gain of 400 ft. Pets are not permitted at our