The choice. Los Glaciares in Argentine Patagonia is not a single glacier viewpoint. The southern sector around Perito Moreno Glacier is generally approached from El Calafate; the northern sector around El Chaltén is a different base for mountain trails. Treating them as neighbouring stops on one short park walk gives a false sense of distance and time. Decide whether the visit is a glacier-viewing day, a hiking stay, or both on separate days.
Perito Moreno or mountain trails?
The southern visit is organised around the viewpoint and walkway network facing Perito Moreno. A visitor can enjoy the glacier without booking a boat, whereas navigation is a separate commercial activity with its own conditions. Consult the Argentine National Parks administration for the park sector and current visitor information before setting out from El Calafate.
El Chaltén is the starting point for many northern walking routes, not the entry to the Perito Moreno walkways. Trail choice depends on distance, weather, daylight and closures. A trail that looks modest on a small map can involve long hours and exposed conditions. Check the named route and park notices; a general park-open status is not enough to declare a specific path safe.
Fees, roads and a changing landscape
Park admission and the cost of a boat tour are separate decisions. Use the official national-park tariff page for the sector and date of travel; prices and accepted methods can change. If driving, choose the sector's actual entrance rather than routing to a pin in the centre of a vast protected area. Allow weather margin and confirm road conditions locally.
The glacier image credited here is from 2005. It identifies Perito Moreno, but the ice front, facilities and visitor viewpoint may look different today. Do not use a historical photograph as evidence of current access or a precise view.