With a name like Laguna 69 I just had to hoof it up there. The lake stands below the glacier covered peaks, notably Cerro Pisco, at a lofty 4650m, so getting up there was slow going due to the altitude. It took three hours of walking up and just two to get back down. It was one of the most stunning day hikes I have every enjoyed.
The following photo shows Huascaran (on the right), at 6768m, it is Peru´s highest peak.
Cerro Pisco above a waterfall.
View from the final and very steep climb up to the lake:
Arriving at Laguna 69, a classic glacial cirque, with the most intense blue colour: