Lake Irwin is an alpine lake near the ghost town of Irwin in southwestern Colorado. Irwin was a mining town that was settled in the 1890's, with the discovery of rich silver ore. If interested this is a good description of the town. https://westernmininghistory.com/towns/colorado/irwin/. Lake Irwin sits at an elevation of 10,200 ft. and is very popular for its beautiful views.