Smiley Mountain is 11,508 feet high. I started a little further back down the road than I probably had to, but the road is pretty bad along there and hiking along the road for a while is no big deal. The hike is mostly off trail except for the part that is down on the road. I basically went right up to the ridge and followed it all the way up to the top. For the most part it's pretty tame, sort of like Big Black Dome. On the way down I went off the side which was a lot steeper but got me back down the the road more quickly. If I had to do this again, I'd do it the same way. Nice views from the top.