Locals like to say that on a clear day, there’s nowhere else on Earth where you can see so far overland. Without a doubt, the most spectacular thing you’ll see at Diamond Head State Monument is the incredible view.

The view from Diamond Head State ParkPhoto credit: Michael Gordon / 7. In addition to the loose gravel, there are several narrow and awkward parts of the trail, and your ankles will appreciate the extra support that tennis shoes provide. The trail includes a concrete walkway, loose gravel and soil, a 225-foot-long tunnel (it looks pitch black as you approach it, but it is dimly lit inside), and many, many stairs. The hike itself is only 0.8 miles each way, but you gain 560 feet in height along the way. The trail to the summit was built in 1908 as part of Oahu’s coastal defense system. To each their own, but I’m glad I had my sneakers with me on the hiking trail! 6. I have to say, I did see quite a few people wearing casual flip-flops, and they were undeterred by the loose gravel and switchbacks. In addition to a bit of money, for the hike you should bring your own water bottles (there are fountains at the beginning of the trail, but none as you ascend), a hat and sunscreen, and good walking shoes. Tourists at the top of Diamond Head CraterPhoto credit: Jamison Logan / 5. If you have ID that proves you’re a Hawaiian resident, your entry and parking costs are free. You can also pay the $10 parking fee if you wish to park. But the new system changes everything! Now the reservation system means you pay $5 per person in advance online, via credit card. Prior to the new reservation system, admission to Diamond Head State Monument was $5 per car (no matter how many people were in it) and $1 for pedestrians, and it was cash only. It helped me realize that Diamond Head is so much more than a tourist attraction - it’s a beloved part of the community. The temperatures were relatively cool, there weren’t many people (though we were far from alone), and it was neat to see so many locals getting their workouts in. We started our hike not long after the park opened, and I’m so glad we did. If you’re visiting Hawaii from mainland North America and jet lag has you awake bright and early, visit the park and hit the hiking trails before the crowds get there. So if you are a slow stroller, make sure you’re there at the beginning of your time slot! 3. However, you must leave by the end of your reservation time. Visitors are asked to arrive within 30 minutes of their reservation time.

Reservations can be made up to 14 days in advance for now, but the long-term plan is to change the system so reservations can be made up to 30 days in advance.

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