Blue Middle Distance course at Pacheco State Park, BAOC. Unfortunately, the course was thrown out because control 5 was hung ~50 meters off; I had a late start, so it was in the correct location when I arrived.
Pacheco was interesting - the contour detail reminded me of the ridge-and-valley orienteering that I have seen in Missouri and Ohio (e.g. 2011 Relay Champs Middle, Night), but the relief was much more severe. The vegetation was very sparse - the hillsides were entirely open with clumps of trees and shrubs, so visibility was 200+ meters. I wasn't prepared for the physicality of the terrain - both the strength and power needed to ascend/descend and the rock-solid stability needed to side hill with speed and confidence. The entire excursion was arduous.
I was careful to pay attention to my compass especially when I was trying to be conservative with respect to elevation change. Going perfectly straight isn't that practical in this terrain. My only mistake of consequence was at control 15, which was on (actually, in) a tree. I was running up a reentrant from 14 scanning the opposite bank for the tree, and I simply didn't notice the control; I overran by about 100m. I finished five minutes behind the winner, Nick Barable and a little over two behind Zach Schroder.
Quickroute.