Glacier was in my plans before leaving Alabama. But with having serious lung disease, I began right away struggling with the thin oxygen at our first destination, Estes Park Co, RMNP. , as I do not have medical oxygen or a concentrator. I was advised by doctors in Laramie and dr clinic in Grand Teton, I should either leave the higher altitudes or get a concentrator. So I decided to go ahead and see Yellowstone for my second time, my brother's first time, then forgo driving the Beartooth Highway and seeing Glacier and just head west to the coast of Oregon. I am still disappointed in missing it. Maybe next time I will have more sense and be more equipped for the thin air.