There is a patchy band of primary forest below the steep/cliffy area on the south side of Deepwater Valley. There appear to be five areas of primary forest, but only one (second from right in image above) has been visited on foot to date. In that patch the old firs are from 8-foot to 11.3-foot in circumference at breast height. One tree that had been cut by a poacher (see video below) had a diameter of 2.8 feet (8.4-foot circumference); a ring count suggested the tree was 235 years old when it was cut.
The five images below show five areas of old forest on the south side of the valley; going down the page, they progress from east to west.