Hey Steve,
Do you happen to recall how long this hike took, and (for me) more importantly, how long it took you to get back to the "main trail" (just above Nevada Falls), or as a minimum to Lost Lake?
I would like to take some photos of the "monolith" at sunset, so would need to get down (past the area of trail finding/exposure) within the 45 minutes (or so) of sunset (during the twilight hour).
No problem hiking the JMT after dark, but would not like to be stuck up there trying to find my way in the dark.
