1-2-3-4 went OK. Then I did something really dumb on my way to #5 (I think I had my map folded too small, but I still should've known I hadn't gone far enough to be on the correct trail at the base of the correct hill). Ugh.
The stupidity magnified itself on my way to #6. I struggled up a steep hillside with lots of prickly underbrush -- instead of just continuing to follow the trail. Obvious brain lapse.
Could have taken a more efficient route to get to the trail on my way to #9.
I got distracted by trying to outrun other people on the way to #11 and promptly lost contact with the map.
Sigh...