Great answer, park does close at sunset btw
The road to the top is closed to cars, at least it was 5 days ago, and a few weeks before that too. Park here, Dropped pin Near Wadhams Rd, Goshen, CT 06756 https://maps.app.goo.gl/A2ikSbxmLPT874aeA , it will give you the closest walking distance to the top. Just walk by the car gate and keep walking up. Also the tower that use to be at the top is no longer there, that's a big bummer. Don't know about closing time, sorry.
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