We did the hike from Haena State Park to Hanakapiai Beach and then over to Hanakapiai Falls yesterday. This is basically the first 2 miles of the Kalalau Trail, which would continue on along the coast instead of going inland to the falls. It’s 2 miles to the beach and then another 2 miles to the falls, so 8 miles round trip. We started at 10:00 and finished at 6:00, which included time spent at both the falls and the beach. Sections of the trail are fairly steep and can be muddy depending on recent rainfall. You should have good footwear (hiking boots, Chacos, etc.). Don’t do it in tennis shoes or flip flops. Take plenty of water and snacks. We also took 2 bottles of rosé and some beers because some of our people are like that. But it was great having a glass of rosé while looking at the falls. Our experience was that most hikers try to start early but that also means the trail, waterfall, and beach were more crowded early. It thinned out in the afternoon. When we arrived at Hanakapiai Falls there were about 40 people there, but by the time we left there were only 6 people. When we arrived at the beach on the return segment, my wife and I had the entire beach to ourselves. So maybe a later start time is actually a good thing if you hike fast enough to catch the last shuttle back at 7:00 pm. I would love to do the full Kalalau Trail hike but my crew isn’t up for it so maybe it gives me a bucket list future goal. Regardless, the hike we did was amazing and probably a top 5 hike for me.