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Go to Tampico Beach called Miramar, go to the Jetty (Escolleras) going in south direction. When you get to the Jetty go west on the road beside the river, there you will find a big refinery, 5 minutes drive on your left side you will cross a railway track, 2 blocks after crossing the railway turn left going to the river.
Then leave your car the in a little parking lot were you cross in a boat called (Guachinangera).
Get in the boat pay 1.5 pesos per person to cross the river. When you get to the other side walk 30 to 40 minutes towards the beach following any small road.