I've been changing the filter in the house every couple weeks since the fires started. I did see blue sky for part of the afternoon one day this week. But horizontal vis is hazy to 5 miles, total obscure past 10. Strange, tho, vertical vis is fine, clouds at 15-20k. We're in ozone alert every day this week, which is wierd. It's usually in January. Really made Young Eagle rallye this past weekend disappointing. Great flying, no mountains to see. Not even downtown Denver.