Thousand Island Lake sits at the base of Banner Peak in the Ritter Range.

The lake is a glacial tarn, formed in the bottom of a cirque when a glacier retreated.

[3] Thousand Island Lake is accessible from several hiking routes:[citation needed] Parmelian Prints of the High Sierras is a portfolio of 18 silver gelatin photographic prints made by Ansel Adams in 1927.

It was the first publication of a portfolio of his prints, produced not long after he decided to become a professional photographer, and has since been called "a landmark work in twentieth-century photography.

"[citation needed] His photograph, "Banner Peak – Thousand Island Lake", was one of the 18 chosen for the collection.