You must enter the Parque Nacional Talampaya by guided visit, arranged at the visitors center. The standard 2½-hour trip is included in your entrance fee. You'll spend much of the time in a comfortable minibus and there’s little walking involved; nevertheless, take water and protection from the fierce sun. For a little extra, you can extend the visit to another nearby canyon or do the route on the roof of a truck. You may also visit further-flung valleys within the park.
Guided walks (AR$300 to AR$500) and trips on bicycles (AR$400) are also available; these are more appealing ways of exploring if the heat’s not too intense, though you'll still likely have to pay for transportation into the park if you're on foot. There are often night excursions available when there's a full moon.