After crossing the border into Argentina, we drove to Puerto Frias where we stopped in the "Anduna" which is customs and immigration. We then boarded a boat for a trip north on Lago Frias to Puerto Alegre and a short road trip to Puerto Blest.

A translation from the Spanish Language Wikipedia:
"The Lake Frías is a mirror of water of glacial origin located in the Nahuel Huapi National Park in the province of Rio Black , Argentina , in the department Bariloche .

The lake has the shape of an elongated oval in a north-south direction, and is located at a latitude of about 41º South. Its eastern and western margins are formed by very steep rock walls partially covered by vegetation that submerge in the waters, giving Lake Frías the appearance of a fjord.

The area is located at the foot of the Andes mountain range , which is why copious rainfall is registered as a result of the humid winds that blow most of the year from the Pacific Ocean , with records of 3,500 mm of precipitation per year. Winter is the season with the highest rainfall record, and it is the place in the Argentine Republic with the highest annual rainfall records.

The lake is fed by several streams that provide meltwater and rainfall produced in the area; the main one is the Frías stream, which provides meltwater from the glaciers of Mount Tronador . On its northern margin, the lake discharges into the Frías River, which flows into Lake Nahuel Huapi in the vicinity of Puerto Blest .

The contribution of the sediments transported by the streams, in particular the channel of the upper Frías River that runs for about 10 km to the North from the foothills of the Frías Glacier on the Tronador hill , gives the lake its characteristic and beautiful turquoise tone, which makes it one of the most visited points of attraction in the Nahuel Huapí National Park.

On the southern shore of the lake is Puerto Frías, a place that has a small pier, a post of the Argentine Gendarmerie and a Migration Office. From Puerto Frías starts the road that crosses the border through the so-called Pérez Rosales pass , and that allows crossing the border between Argentina and Chile.

During the winters, some portions of the lake get to freeze, which gives the landscape an unparalleled beauty.

Originally, the lake was named Cold Lake by the explorer Francisco Fonck . Its name was later changed to the very similar Lago Frías , after Félix Frías , a late 19th-century Argentine politician and legislator . Frías was the Argentine representative in Chile during the government of Domingo Faustino Sarmiento (1869) and the staunchest defender in the matter of Argentine sovereignty in Patagonia .

There is a boat service that allows you to cross the lake. The service is the only connection route between Puerto Alegre and Puerto Frías. The Puerto Alegre pier on the north bank is linked by a vehicular road with Puerto Blest, which is about 3 km away.

Puerto Frías constitutes one of the ends of the "Pass of the Clouds" crossing, which allows you to travel along a path of great beauty a section of the Andes mountain range in the vicinity of the Tronador hill . The other end of the Paso de las Nubes traverse is in the area called Pampa Linda . The "Agostino Rocca" refuge of the Club Andino Bariloche is located in the area of ​​El Paso .

From Puerto Frías it is possible to cross to Chile by means of a bus that circulates along a road for vehicles. The road extends for about 30 km and crosses into Chile through the Pérez Rosales pass , reaching the village of Peulla and Lake Todos Los Santos."
https://es.wikipedia.org/wiki/Lago_Fr%C3%ADas_%28R%C3%ADo_Negro%29

I hope you enjoy these images. As always, downloads are best.
Mark