Wow, what a great hike! We started at 6am going up Siphon Draw to the Flatiron Summit and then across Ridgeline Tr to Peralta Rd. Going this direction kept us in the shade going up to Flatiron. While this hike isn't particularly long (12.2mi by my GPS), it is very difficult. You will get poked, scraped and jabbed often on this unmaintained, single track trail. Navigating this trail is pretty easy by following the cairns. It is beautiful, rugged and remote. We didn't see a single soul all day after we passed Flatiron. If you're looking for a true, tough AZ hike, this is it. Awesome!