from San José drive to la Pavona (via Guapiles). There you take a boat to Tortuguero. The rental car can be left at the supervised parking lot (10$ per day).
depature of boats: 7.30am, 11.00am, 1:00pm, 4:00pm (times can change at short notice)
Take the bus in San Jose at 9am to Cariari (leaves at Cran Caribe Bus Terminal) drive time about 2 hours. In Cariari take the bus to la Pavona, depature at 11.30am. In la Pavona switch to one of the boats to Tortuguero. arrival in Tortuguero at 2pm.
from San Jose to Tortuguero for example with natureair. depature at 5.50am, arrival at 6.55am.