There is a wealth of locations across the valley to explore, and Tafi is a hiker's paradise.
Horseback Riding -- La Morocha Cabalgatas, Galeria Los Arcos, Avenida Presidente Perón (tel. 3867/154-123135 [cell]; www.lamorochacabalgatas.com), will hook you up with some horses to explore the area.
Trekking -- La Cumbre, Av. Presidente Perón 120 (tel. 3867/421768), hosts treks around the lake and climbs to the nearby mountain known as Cerro Pelao. Aucache Expediciones, Felix Sosa s/n (tel. 3867/421378), is another agency that conducts trekking excursions.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.