Check out the atmospheric inversion evident the in background of this photo. The "steam" from power plants on the left is rising just a bit before hitting an invisible ceiling and spreading right over downtown Denver (right side). Nice yellow haze. Ick. The air up here on the hillside is probably a bit better -- I hope.
Tuesday evening's workout: 1 mile on the stationary bike to loosen up, 5 minutes on the treadmill to warm up the legs and make sure they're fine, then a run around the block: 3.25 miles, 38 minutes, and 290 feet of gain.