King Tours. A roster of tours includes trips to renowned attractions like Manuel Antonio National Park, as well as crocodile boat adventures, deep-sea and coastal fishing trips, horseback rides, and canopy tours. The company can also book tours to destinations elsewhere in the country, such as Poás and Arenal volcanoes, Monteverde Cloud Forest, and Isla Tortuga. Main road into Playa Herradura, in front of Los Sueños, Herradura, Puntarenas, 61101. 2643–2441; 800/213–7091; www.kingtours.com. From $85.
Rios Tropicales. High-quality adventure tours include hiking, biking, kayaking, and white-water rafting trips on rivers near Manuel Antonio. Their Quepos franchise, H20 Adventures, organizes day excursions on the Naranjo and Savegre rivers. Central Colon Bldg., San José, San José. 2233–6455; 866/722–8273; www.riostropicales.com. $70–$99.
Team CRT. The many services include a variety of Central Pacific tours, such as a canopy tour near Manuel Antonio, kayaking, and rafting. They also provide car rentals, private drivers, shuttle vans, and a 4WD off-the-beaten-path "adventure" transfer between San José and Manuel Antonio. 2508–5000; 888/236–4447; www.costarica4u.com. Kayaking $69; canopy tour $75; rafting and national park tour $98.
Costa Rica Gateway. Since 1993, expert birders (and brothers) Kevin and Steven Easley have been organizing comprehensive and customized bird-watching tours. They know where the birding hot spots are, as well as all the best birding places to stay and how to capture the birds on film. Alajuela, Alajuela. 2433–8278; 888/246–8513; www.costaricagateway.com. Tours start at $110.
Costa Rica Living and Birding. Guide Patrick O'Donnell is not only knowledgeable but also particularly good at helping new birders see the birds. He offers custom birding tours, mostly day trips from the San José area. For up-to-date birding news, check out his informative blog. Santa Barbara de Heredia, Heredia. 8402–7321; 716/778–2091; birdingcraft.com/wordpress. From $110.