Nice rolling course going the net downhill direction from trail's start to end. Warmed up fairly quickly. Whereas I started running at 52 Fahrenheit at 8:20 to get to the trailhead, it was probably close to 80 degrees by the time I finished this. Fires in Glenwood Springs to the north affected the air quality a little bit, but not as much as they had in the days previous due to the wind direction. Drank water before running to the trailhead (6.35 miles). That was a mistake. Should have brought energy chews and water to take before starting the attempt itself.