I decided to backtrack and find the correct trail and follow it at least into the cirque below the mountain. I DID find that trail and it immediately began ascending, first through lush forest transitioning eventually to sub-alpine meadows.
I stopped in the cirque and rested but an uncertain feeling kept coming to me since I'd missed the trail. The mountain didn't seem to look like the guidebook photos and I was skeptical I was even in the correct cirque or even looking at the right mountain!
After a bit of a rest I decided to continue up the scree slope, if only to get a better view. Once I got going I found it hard to stop, telling myself things like "I'll stop at 8000 feet" and so on.
The scrambling included a few fifth-class moves through rock bands but I kept going, finally stopping at 9500 feet. where I took these photos.