Actually I don’t remember very many waterfalls. I did some more looking on AllTrails. Now I think it was the aiea loop that I extended into the aiea ridge trail because I do remember the view of the highway going into the tunnel. It wasn’t super challenging but the views were cool and the diversity of vegetation was amazing! That being said I was there for about 6 weeks and if I wasn’t working I was on a trail so some of them may be merging in my mind.