In the morning :

10.00 AM - 12.00 AM

Past midday :

01.00 PM - 07.00 PM
01.00 PM - 09.00 PM (Electric cars only!)

The track is open every day of the year, except the days of races or other events.
See track status

As the access to the track is controlled by a barrier, guest-drivers first has to ask for admittance.