The trials close at sundown and hiking is not premited after dark unless on a night hike program with staff.
Sometimes they have night activities, though.
No park closes at dusk as the latest. Technically if it's past 8 but still light out and your on the trail already they won't get mad or anything but if you go out intentionally after dusk you could get into a wee bit of trouble. Unless you have reservations for being out there after hours which they do have.
Most likely not? 9:00 to 5:00 on everyday but Sunday. 1:00 to 5:00
I'm pretty sure it is not.
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