Must be the best trail walk in this area. Navajo Loop would be close 2nd but Wall St was closed and is until mid June due to risk of rock falls so I could not really rate it. This trail is photographers delight. Take your time shooting away the minutes.
It takes around 5 hours leisurely for reasonably fit person, take plenty of water and a hat.
You can avoid park fees by taking the carpark just left of the park toll booth or as I have observed, drive in before 8am (govt employers work by the clock and are not at their desk until 8) and get a freebie entry. (ps We had annual pass, for all national parks for $80)
ps. don't expect portaloos down the valley.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.