Recently came across this image of Ypsilon Lake at 10,540 ft elevation in Rocky Mountain National Park taken while hiking in 2012 after 4.5 miles and 2,180 ft of elevation gain.
EOS T2i/550D with EF 8-15 Fisheye at ISO 100, f/11, 1/125, and 10mm (diagonal fisheye on APS-C).