Altitude was 11500. I ate lunch in the the second floor of the terminal building. Coming back I flew North to Bend, then followed Highway 26 past Government Camp, all at an altitude of 12500 feet. 12500 feet is the maximum allowable altitude for extended flight without oxygen or pressurization. I checked carefully for symptoms of hypoxia but did not detect any.
Mt. Hood is shown above.
A few miles from Hillsboro something caught Romeo and rolled it to the right. I don't know if it was a thermal, wind shear, or wake turbulence from a Learjet that was doing a 360 in the vicinity. The fact that it was a pure roll suggests it was wake turbulence. It wasn't a threat to the safety but it did get my attention. I didn't make the A6 turnoff.