I would imagine that it changes from day to day depending on which way the wind blows. We had smoke here on Saturday and I live 350 miles away. This morning I see it to the southwest.
There have been a number of fires that have popped up this weekend so the smoke has been swirling around the mountains - not sure where it is all coming from. A fire along I-70 west of Rifle closed the hwys there going westbound for a while. There's also a fire in Eagle county now. And there was also a fire near Canon City.
You can check for air quality online at https:/…colorado_summary.aspx