Someone just alerted me to this post that appeared on 4Chan, in 2015. The coordinates on Desolation Trail appear along with this message: "Bring a shovel. You'll have to trespass to get into the area, but no one will be around"
Here's the link. Warning: it contains not-safe-for-work images.
There may be a bit of an "echo chamber" effect here as readers have noted the 4chan post is dated the same day as the original post on the blog, meaning the poster could have simply grabbed the coordinates here and reposted on 4chan for internet karma.