Argentine explorer Francisco Moreno saw the mountain on 2 March 1877; he named it Fitz Roy in honour of Robert FitzRoy who, as captain of HMS Beagle, had travelled up the Santa Cruz River in 1834 and charted large parts of the Patagonian coast.

[8] The mountain is the symbol of the Argentine Santa Cruz Province, which includes its representation on its flag and its coat of arms.

On February 27, 2014, Chile's National Forestry Corporation created the Chaltén Mountain Range Natural Site by Resolution No.

The boundary was defined by the following mountain landmarks and their natural continuity: Mount Fitz Roy, Torre, Huemul, Campana, Agassiz, Heim, Mayo, and Stokes (nowadays Cervantes).

[26] In 1998, the "Agreement between the Republic of Chile and the Republic of Argentina to determine the boundary line from Mount Fitz Roy to Cerro Daudet" was signed, defining section A and a small part of section B, with the area between Fitz Roy and the Murallón still pending.