That sounds like a lady who was planning on being gone a while or one who is really OCD about having survival gear with her at all times.
I never carried that much with me even when hunting in the northern woods much less for a couple of hours of hiking.
Taking a multi-day pack on a two-hour hike? I tend to be over-prepared and carry too much but this chick is another level. I was in the area (near Kanab, UT) when this was going on. The highs were in the upper 70s to low 80s, so what’s with the winter gear for a 2-hour hike? That’s a coincidence that’s hard to explain. I was out hiking, too—in shorts, a t-shirt, and two liters of water in my hydration pack. I had a hoodie sweatshirt and cotton sweat-bottoms—in the car. The temps were summer-like, pushing 80 with very intense sun because the skies were so clear. The temps were low 60s at night, I could see light pants and a very light jacket at night. That Patagonia puff jacket is way too warm for this, my work buddy has one that he wears when it’s about 35 F outside.