Take the ferry from Puntarenas to Paquera a couple dollars per person, or about $9 per car, and then drive or take a bus. The road from Paquera is Cobano is pretty well paved, though from Cobano to Montezuma the road is rather poor. By car, it will take about one hour to drive from Paquera to Montezuma. Obey the speed signs, as you may encounter traffic police.
Alternatively, you can fly from San José to the small airstrip at Tambor and then take a taxi. Both Nature Air and Sansa have daily flights, which take around 30 minutes. The cost of flying is much more expensive than using ground transportation, but if you are short on time, flying is the way to go. Coming from Tamarindo or anywhere further north on the Nicoya Peninsula, there are shuttles available for the trip.
