From Santiago to Olmue in Chile?

Hey. Im In Santiago de Chile and Ive decided to visit La Campana National Park in this country. The problem is that I have no Idea how to get there. I only know that the nearest city is Olmue. Can you tell me how to get from Santiago to Olmue? Is there a plane or at least a bus? Has anyone been there?

Well, to be honest its not so easy to find transportation for this relation. When I was in Santiago I wanted to visit Olmue, and I went to bus station but I couldnt find out anything about departures. I dont think there is a flight because Olmue is a little city. The best solution is to rent a car. Its much cheaper and practical from taking a cab. Sometimes cab drivers in foreign countries can double-cross you and you might end up paying for just one ride the same amount you would give for renting a car for a day. And you can perhaps find some other people interested in going there and split the expenses with them.