unc, that's a no. And welcome back from your trip.
Tul, you got me. The place I am is the highest lake in the world, but it is not a large lake and the word "pool" has been used in some descriptions I've read, like this one:
The Highest Lake in the World
"Ojos del Salado Pool", 6,390 meters = 20,965 feet, Argentina
Ojos del Salado Pool is on the east face of Ojos del Salado, the highest active volcano on the southeast side of the border between Chile and Argentina. I was notified of this lake in 2007. Andes has a nice picture of this pool at the link below:
Andes Website - trekking, hiking, skiing and climbing in the Andes mountains of South America
Andes reports that Ojos del Salado Pool is 100 meters in diameter. If the lake is circular, this measurement means that the surface area is 0.785 hectares. That is why I classified this lake as a "pool"; according to my definition on the home page, a true "lake" must occupy at least 1.0 hectares.
That figure of 100 meters is probably an estimate. I would love to promote Ojos del Salado Pool to "lake" status, but we need an accurate measurement of its size. If you plan to climb Ojos del Salado, here's what you need to do: Pace around the edge of the lake, and count your number of steps. When you get back to a measuring tape, measure ten of your strides. I will calculate the surface area from that, and post your results here. It will also be helpful if you can estimate how close the pool is to circular.
In this Wiki reference, it calls it the highest lake in the world:
Ojos del Salado - Wikipedia, the free encyclopedia
Due to its location near the Atacama desert, the mountain has very dry conditions with snow only remaining on the peak during winter. Despite the generally dry conditions, there is a permanent crater lake about 100 metres (300 ft) in diameter at an elevation of 6,390 m (20,960 ft) on the eastern side of Ojos del Salado.[3] This is most likely the highest lake of any kind in the world.
And in this Wiki reference
Lake - Wikipedia, the free encyclopedia they say:
The world's highest lake is an unnamed pool on Ojos del Salado at 6,390 metres (20,965 ft).
You're up, Tul. Go hide and we'll find you.