Quartz Trail from Lost Dog Trailhead Fitness Hike  This Very Difficult hike will visit the quartz formation that can be seen for miles all over Scottsdale. The hike covers 9 miles in about 5 hours with significant elevation gains on rocky trails. Experienced hikers suggested. Bathrooms available at the trailhead. Bring water, snacks and even a lunch for the trail. No dogs please. Arrive 15 minutes before.