My friends tell me that all the smoke has cleared from Mt. Shasta

But this time of year around the Sierras or Cascades or Trinities you need to likely call and ask someone the air conditions before you go there. This way you will avoid (if you have trouble adjusting to 3500 feet or higher for sleeping there so you don't have to spend a night in the hospital breathing smoke (AND(trying to adjust to the altitude too. (They would put you on oxygen or you could likely also drive to Redding so you can breathe too if someone drives you there.  IF you already live at altitudes of 2000 feet or more this might not be a problem for you. But for me at age almost 70 it can be a very big problem (at least for a day or two) until I adjust. After a day or two I can ski at 8000 or 10,000 feet and not get winded, I can swim at 6000 feet and fell okay or I can climb up to 10,000 feet and be okay if I first sleep a night or two at 3500 feet. However, I know enough not to drive to Mt. Shast and try to camp at 8000 feet at Panther meadows the first night I'm there at this age the first night I drive up there.

However, remember I now live at Sea level on the ocean at around 100 feet in elevation at this point most of the time. For others at higher altitudes this likely wouldn't be a problem (if you live above about 2000 feet in elevation.)

I first discovered a problem with "Sleeping at altitude" when I was 17 and climbing San Gorgonio which is over 11,000 feet in Southern California with my father and his friend. I started throwing up camping in the middle of the night at 10,000 feet and my father and his friend told me to pack up and head down to 8000 feet. So, I ran as I kept throwing up down to around 8000 feet. Since then I don't ever sleep above 8000 feet even when climbing mountains. So, even as I climbed mountains as a younger man I made it a point to sleep at 8000 feet or below and summitting from getting up at around 8000 feet or under camping. This way I could summit wearing only a pack that carried crampons, Ice Axe, ropes, sometimes caribiners and pitons depending what I was climbing. And of course non-perishable foods like protein energy bars, water etc. and a medical kit for blisters or falling injuries like when climbers above you knock loose rocks so you might get hit in the head or other body parts above 10,000 feet on steep slopes. So, being prepared for almost any situation allows you to survive your climbs so one day you can tell your children and grandchildren about your climbs instead of being dead.