I live less than 10 minutes from Wm. Pond and know the area that you have described well. I am there several times each week with a camera and will continue my search. It's a great place for bird and nature photography.
I ran across another photographer at William Pond who showed me some photos that she got of an oriole in the area. I'll keep looking but so far have not been able to find it.
I've seen the Oriole twice at WB Pond. From the platform that overlooks the pond, the main trail goes east. There's an offshoot trail that then takes you towards the American River south of the pedestrian bridge where there are some small rocky rapids. I saw it in that area. I used Merlin to identify the calls and saw it pop up. There's also a nest hanging in one of the trees.
