Correct
I am not sure trail distance you can check with enterance lobby for more details please.
4 mile trail is open. There are no amenities at the top (bathroom, water etc). AFAIK tomorrow they are opening the road, but that might have changed.
I believe you can hike there from the valley but it's an intense hike and would require 3 hours up and 3 hours back down. Around 5 miles each way.
Thanks! Your answer is awaiting moderation.