Are there transport options in Costa Rica than can be shared between travelers?

Question

I am aware of public buses, flights, and shuttle bus companies Grayline and Interbus

Do you have other suggestions? Are there easy ways to book shared cars or shuttles with other travelers? Do you particularly recommend or advise against any of these?

Our route will be San Jose ⇨ Tortuguero ⇨ Arenal ⇨ Monteverde ⇨ Manuel Antonio ⇨ San Jose. (So we will not take any flights most likely.)

Answer 1

This is not specifically for Costa Rica but just to mention the obvious:

• Put up a note on the info board in popular hostels looking for people to join you.
• Ask on the Lonely Planet's Thorn Tree 'Travel Companions' forum for people to join you.

If you can find a few people you could rent a car or share a taxi.