Lovely trail. Very easy and great for going on a solo trip. The amount of foot traffic makes it feel safe, but is also part of its downfall. I went on a Sunday and there were lots of very noisy children and people playing music from their cell phones as they walked. I personally prefer quieter trails where there's less to detract from the nature experience. I got to see a few lizards and a peregrine falcon. Hoping if I return I can find a bighorn sheep. I went in early April and found it mild, but definitely heed the heat warning later in the season as aside from the tunnels, there's not much in the way of shade. Probably goes without being said, but if you do this trail, make sure to actually finish it and see Hoover Dam.