All Contra Costa County Library locations are open to the public.
The Study Room is open for booking.
The Hoyer Hall meeting room is scheduled through the City of Clayton.
New hours for the Clayton branch effective July 1:
Tuesday 12:00pm - 8:00pm
Wednesday 10:00am - 6:00pm
Thursday 10:00am - 6:00pm
Friday 10:00am - 6:00pm
Saturday 10:00am - 6:00pm
Closed Sunday and Monday