Just to add a bit, the trail starts almost immediately across from the entrance station.
And it is a trail almost the entire way up if you do not lose it. I lost it just a few hundred feet from the top and was doing some scrambling which would have been okay except for feeling the altitude - a bit queasy. I did find it again. I was also thirsty and hungry but the queasy kept me off of any intake until I got to the top. I felt fine once at the top. From the top, the trail was pretty easy to follow on the way down but occasionally, it is irregular and a switchback can hide somewhere.
Great views of Yosemite and down to Mono Lake.