As everyone said gates are always open. But is it really safe after sunset. Also be careful, I do walk there everyday and recently two time spotted snake which to me looks like rattle snake.
I have been biking from behind Yahoo to Stevens Creek trail after dark frequently during winter. None of the gates were ever locked as much AFAIK.
No signs around the Bay Trail at the Water Treatment lot. Id say sunset to be safe but there are no gates that get locked. Ive gone there to watch meteor showers and fireworks late at night and a few others were doing the same.
The entrance by the waste and recycling site states the the trail entrance and parking closes at sunset .
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