We did this hike a few years ago. Nice canyon. I think we saw one other person that day that was it. I have hiked over here quite a bit, but had never taken this trail. We were trying for Miller peak, but when we got to the crest trail at the top of Miller Canyon, the wind was ridiculous. Again, to many nice days to hike than have to tolerate that kind of wind. There were some sketchy spots of snow along the trail beyond too that we didn't feel like sliding down. So we turned around and headed back down. Good trail up through the canyon though.
I hiked this trail twice. It's a beautiful change to see the lovely trees and great vistas. I would recommend starting at the Brown Canyon Ranch and hiking up to where the trail intersects 3 other trails (about 2.5 miles) and then down again. Much more scenic than completing the loop.