Yes by reservation only. Enjoy

Absolutely no need for a tour guide. This is a very small footprint, and best to include with some other activity in the area. You just go past the parking lot and up the stairs, then you can go below to the stream to cool off. The scenery is seen from there and the road in. It is a short stop.

A two year old could do this with maybe some help towards the end. A stroller would be complicated as there are stairs in a lot of places. Not too many to be excessive, but an inconvenience with a stroller. Hope you enjoy it, it’s a beautiful park!

I did not use my phone however I did notice Bars as I was taking pictures with the phone. I have Verizon. also there is a gate attendant he could help as well

30min to 1hr

Yes - there was a wall over looking the water that people were sitting on. But before you get there same road there is a park left side as you head up with picnic tables and huts etc. a great spot to enjoy a picnic, it is a tribute to those that immigrated to Hawaii.

Too far and uphill. Take a taxi.

I did some googling, and this is the most recent info I could come up with, "The County of Maui’s Kepaniwai Park at ʻĪao reopened on Monday, April 10, 2017, but according to a Parks Department announcement ʻĪao Valley State Monument in the upper section of the valley will remain closed as the State continues conducting damage assessments, clean-up and repairs. State officials have said that the plan to reopen the state facility to modified access sometime this summer. " So to answer your ? Technically, yes & no.

I hear it is still closed from December floods but cannot be definitive on this. Iao Valley did not really have a "real hike" in it as it is more like 0.25 round trip. It has a little vertical but mostly is a beautiful place to stretch your legs. I would hike either Haleakala area (I believe that Hosmer Grove is still closed as well) but nice further up. Past Hana, about 10-12 miles) is the Waimoku Falls trail - nice easy full featured hike. The Wildlife Refuge and its boardwalk is a couple mile round trip and often has unique birds and mullet fish to watch. Also around the west end as you follow Hwy 30 north along West Maui it turns from 4 lanes, down to 2 lanes and at the far north end it turns into "Hwy" 340 which is almost a full 1 lane road. There are some short trails across the rugged shoreline along the end of Hwy 30 and the beginning of 340. However use maximum caution on this misery road, It is extremely dangerous and looks on map to be the short road back to Kahului but is nasty, switchbacks, blind corners, etc. Highly recommend after hiking the NW corner, go back around Hwy 30!! That's all I got. Jim

No, the entire area is still closed. You cannot access any of it.