Heading west on highway US-26 about 30 miles outside of Jackson, Wyoming.
Photographed handheld with a Canon 7D using a 100-400mm IS lens at 100mm. Settings were f/11, 1/800 sec and ISO-1600.
We had been driving from Dubois back to Jackson Hole as the sun dropped lower in the sky. As it slipped behind the Tetons these beautiful shafts of light appeared very briefly before the sun disappeared entirely.