I found the HPs for all Washington wilderness HPs, including the 3 whose boundaries I had to find elsewhere. Finding the HPs of the two island wilderness areas was kind of fun, as I had to check the highest elevation of each island (> 100 islands).
I am very confident on having found all wilderness HPs. I did find what I believe to be a minor error for Sloan Peak, the HP of the Henry M. Jackson Wilderness. The Proximate Parent, "Kololo Peaks", is 11.3 miles away, even though the Isolation is listed as 1.25 miles.
I also found one discrepancy with the
peakbaggers.com list, as they had Norse Peak as the HP for Norse Peak Wilderness, but it is actually Fifes Ridge West. It's good that we do these areas ourselves, because I have found at least one discrepancy for every state so far, except one.
My next step is to go back to the states I had previously done and try to find the HPs of wilderness areas not listed
here. If I can't find a good map for boundaries, I'll include them in the list, but leave them blank.