Absolutely beautiful trail. So much green, so close to Phoenix, and about 20° cooler. The creek is gorgeous and refreshing. The trail runs right next to the creek most of the way. The trail is very easy, very wide, and mostly flat except for a few uphills as you get further in. The waterfall is small but pretty and a good place to relax. Past the waterfall is a more challenging trail that climbs right up the mountain to Promontory Butte, which offers an amazing scenic lookout. I've been to Horton Creek 3 times and enjoyed each time.