You get to about 12,300' on Mt. Langley and one trail goes to about 30. As Ken said, there are a lot of variations but let me add there are a lot of variations to get to the Class 2 route on the southwest.
Trails can be clearly marked and folks still get discombobulated. About 7 years ago at the Jct to the seasonal RS and the PCT a guy with map in hand asked me where was the PCT. I had told him twice he was standing on it, which he did not believe, then showed him on his map exactly where he was standing.
Most of the trails are marked at the junctions. Sometimes the signs are missing because of decay.