When Jeff Clow and I were at this spot, he said in all the years he'd be to GTNP, he had never seen the water this still on Jackson Lake. Lucky us!
At Jackson Lake Junction, US 191 meets the north end of Teton Park Road, shortly followed by Willow Flats Overlook, an elevated viewpoint of a big expanse of tall grass, reeds, marsh and sagebrush close to the edge of Jackson Lake.
Two trails start at nearby Jackson Lake Lodge - one crosses the flats towards Colter Bay and the other leads eastwards to two lakes, one quite small (Christian Pond), the other much larger (Emma Matilda). The lodge sits just off the road on a low, wooded hill, offering various services including accommodation, a gas station, restaurant, and horse rentals.
Since the EXIF data was stripped out, due to the nature of my post-processing this image, here's what I was working with: Nikon D3S, Nikon 24mm PC-E @ F11 with ~5 degrees of tilt, ISO 200. 5-shot 14-bit RAW files exported to 16-bit TIFF, processed in Dynamic Photo HDR, exported to 16-bit TIFF, imported back into Lightroom 3, adjusted blacks, exported to my Flickr settings. Et Voila!