Found cheap weekend airfare to SLC for 1st weekend on October. I've already visited Zion and Bryce Canyon NPs last time, so I decided to visit Grand Teton and Yellowstone National Parks. It was the 2nd-to-last weekend to visit Yellowstone before it closed for the winter.
On the way back, I took the freeway route through Idaho, and stopped at the Golden Spike Site at Promontory, UT.
Shot with 35L, 70-200/4L IS (some with Kenko 1.4x), and Tokina 11-16. This is also my last trip with the 40D before switching to the 7D.