Ocean Z.
Yelp
I've hiked quite a bit in AZ. Humphreys was the highest. Brown's Peak (4 Peaks) has the best views from the top, Sedona has the most scenic drive, but Flatiron is the most physically enjoyable. I prefer the scrambling rather than just walking up hills. I love this so much that I do it 4 times a week, every Wednesday, Friday, and a double on Sundays. Helpful info:
1. You need to be in good (not necessarily great) physical condition to get to the top. It's all a matter of pace. If you can climb one boulder, you can theoretically climb 1000 if you have enough supplies and time. There's a short class 3 scramble at the top, but you can take a class 2 detour to the left of it if you have heights issues.
2. People often ask me how long it will take. It's like asking how long will it take to run a marathon. This mountain shouldn't be a first ever hike for you. I suggest hiking Echo Canyon side of Camelback first. Multiply your time on that trail by 2.5 to 3 to get your Flatiron time. That's all assuming you stay on trail. As far as effort level, here's a rough estimate: If your 10K race pace is 6 min or faster, this will feel like a 10 to 13 mile race. If your 10k pace is over 10 minutes, then this will feel like a marathon.
3. The trail is very easy to follow until you crest the basin. At that point, you'll see 3 distinct trails. Roughly 100 feet separate each trail. See diagram 1 below. All 3 will take you to the top, but if you take the left or middle trails, bring your machete and bushwacking skills. The right-most trail looks the most overgrown with trees at first, but that's the official trail, and is very well-kept throughout. It's mostly class 2 scrambling from here.
4. Diagram 2 shows the 2nd critical area where people tend to stray to the right. Go toward that tree and keep left. After passing this tree, follow ROUTE MARKERS! but if in doubt, stay left (before this point, better to keep right).
5. Route markers: First came the Blue spray paint that have since faded, and are too far apart to be very useful other than to give you peace of mind you're on trail. Look for newer white paint droplets that look like Seagull poop spaced 20-100 feet apart after the basin. Some are even grouped to form arrows. Always look for these, especially in wide open areas of trail.
6. Go to hikearizona's website on your smartphone and look up this hike. Download the official route. It'll prompt you to download their mobile RS app. This is a GPS route map that will guide you through the trail. It's a must-have for any novice hiker, so you can quickly see if you're going off trail or not. Load the route BEFORE starting your hike while you have reception.
7. If you have to push bushes out of your way, then you need to back track and find the trail before continuing up any longer. The further you climb off trail, the harder it will be to get back onto the right trail.
8. Bring 26oz of fluids per hour for the ascent under 85 degrees. Double that for 100 degrees. The trail faces west, so most of the climb is shaded from the sun. In summer, If you've used 70% of your fluids and you're still climbing, then it's time to descend.
9. Flatiron is not the top. The summit of Siphon Draw trail is several hundred fee higher. Instead of turning right at the top to go to flat iron, go straight/left and keep climbing. Just keep heading up and look for the cairns wherever there are any intersections. It's a much better view from the summit than from flat iron.
10. Leave your dog at home, or at least turn around at the top of the basin. Don't take your dog to the flat iron. Some boulders are too tall to climb, forcing people to carry dogs in unsafe ways. I've seen lots of bloody paws from the jagged rocks. Dogs also can't cool off like humans. Imagine wearing a plastic bag with a fur coat over it and try to hike with that.
11. Kids. If your kids can hike Echo Canyon, they can theoretically hike Siphon Draw, but ask yourself this: After your kids finish Echo Canyon, will they want to turn around and hike back up and down? And after they've done a double, will they want to do it one more time for a triple? If the answer is yes, then bring your kids on this adventure. If not, you'll have some miserable kids with you 2/3 of the way up, and all the way down.
Reviewer "Bao" said a Camelback double is harder. It's all about pace. You can attack Camelback faster because it's easier terrain, achieving higher heart rate. Echo can be done without hands, but a 2-arm amputee cannot physically climb to flatiron alone. If Bao brought his Flatiron time down to 2hr instead of 3hr, he won't say 2x Camelback is harder.