From riberas take the carretera toward chapala. When you get to the light in chapala turn left and keep on it. You will eventually leave chapala and start going over the mountains toward guadalajara.

You can relax for a little while until you pass the airport. At this point you will need to be a little vigilant again. You be looking for a sign that says "periferico/unesco or UVM" they should lead you to the on-ramp for which you will bear right to go on as soon as you go under the periferico overpass.

If I'm not mistaken it also the same ramp you would take to get to the hampton in and chiles on the otherside of the road except that you don't get off on the other ramp after getting on..

Once you are on the periferico you will continue to Lopez Mates. Probably another 10 - 15 minutes out once you're on the periferico.

I will be going there myself as I need to buy weather proofing for my roof. Might run into you. If not today on Saturday.