It's on the South side of the Valley Circle/Mulholland Drive exit of the 101 Freeway.
On Sundays... normally starts around 7:00AM. But the 1st Sunday of the month you should get there around 6:00AM, because by 7:00AM it's hard to find a parking spot.
It is an amazing collection of cars... from wrecks to megabucks.
Here's a sample of one weekend.
See
Google Maps
.