Which side, west or east? The west side entrance gate opens at 7:30 am with the gate closing at 8:00 pm. Cars can exit after 8:00, but not enter. The east side is always open, having a campground on this side. There is no road that connects these two entrances.
24hrs for west side entrance as there are night hikes ,star gazing,camping !! And east side entrance from 7.30 am to 8pm
Smith is correct. East side is 24 hours. Visitor center opens at 5.
Might want to check the NPS website for hours and closures during Gov't shutdown. Restrictions may apply.
Sunrise to sunset
Last bus is at 5 pm back from caves
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