Over 200 tour operators are recognized by the Costa Rican Tourist Board, with the majority in San José.
Many companies specialize in nature tours, and visits to the national parks and wilderness lodges. They can provide entire guided itineraries, with bilingual guides, and private transport to any part of the country, especially the nature destinations. Many of these nature tour companies also specialized in adventure tourism, such as river rafting or mountain biking. Almost all agencies also provide services such as day trips around the Central Valley, San José city tours, and airport transfers.
Prices vary depending on the services you require. Two people wishing to travel with a private English speaking guide and a private vehicle will obviously pay a lot more than two people who are prepared to join a group and/or can understand a Spanish speaking guide. Note that most of these companies will take advanced reservations.