If you are not visiting on a guided tour, you will need to purchase tickets in advance on the SINAC website. You will need to enter your passport number. For nonresidents: $12 USD/adult and $5 USD/children aged 2-12. The ticket office is located outside the park entrance. There are restrooms available at the entrance of the park only.
There is a parking fee of 2,000 CRC per car ($4 USD).