. Almost all the development in the park is in the national reserve. A buffer area wide surrounds the three sides of the park which do not border on Chile. Los Alerces National Park is shaped like a rough rectangle, extending approximately north to south along the border with Chile and east to west. All of Los Alerces National Park is in the drainage basin of the Futaleufú River, although the river is called by several different names during its course in Argentina. A chain of lakes separated by short courses of turbulent river characterize the park. Lake Rivadavia is the beginning of the chain. The outflow from Lake Rivadavia is called the Rivadavia River which flows into the much smaller Green Lake. The outlet from Green Lake is called the Arrayanes River, which after receiving the outflow from Lake Menéndez continues on to Futalaufquen Lake. Below Futalaufquen Lake is Kruger Lake and the Frey River which flows into Amutui Quimey Reservoir, an artificial lake. The river known as the Futaleufú emerges below Amutui Quimey reservoir and becomes the southern boundary of the National Park. Scattered around the mountains and valleys of the park are a number of smaller lakes and streams. The highest point in the Los Alerces National Park is Cordon de las Pirámides, in elevation. The lowest point in the park is about where the Futaleufú river crosses into Chile. Climate The lower elevations in Los Alerces National Park are classified as Oceanic climates, denominated Cfb, or humid continental climates, Dfb, in the Köppen climate classification system. Moisture-laden clouds from the Pacific Ocean strike the Andes on the Chilean-Argentine border and produce up to of precipitation annually, mostly in the form of rain at lower elevations and snow at higher elevations. Eastward from the crest of the Andes, in a rain shadow, precipitation decreases rapidly, falling to about at the eastern edge of the park. Temperatures in the park range from cold to moderate. Freezes can occur in any month of the year. At the park headquarters at one of the lowest elevations in the park, the warmest month is January with average daily maximum and minimum temperatures of 24° celsius (75° fahrenheit) and 8° celsius (46° fahrenheit). The average temperatures in July, the coldest month, are 7° (45° fahrenheit) high and -1° (30° fahrenheit) low. Average temperatures decline with altitude. Timberline is about above which is