Joseph Creek has a scenic canyon singletrack trail that gets little to no human use because of some self-interested people locking off the easy entrances. I got run off by a rancher at the upper end in the 90s, saying there was no trail. Now I've confirmed there is a trail down this scenic and raw canyon. However, the presumably newer outfitter that owns the trailhead has set-up more gates and no entrance signs since I visited decades ago.
The trails in these canyons are so extremely brutal. Fortunately, this one stays above the brush and thorns for the most part and provides okay footing thanks to the cattle and occasional outfitter use. There will be rattle snakes and sticker bushes to contend with, but that all adds to the adventure. I saw plenty of elk and deer in there and many signs of bear.
Downstream at the confluence of Swamp Creek, there is some private land and cabins. The upper (upstream) trail terminus is also private, as I mentioned, with a no trespass sign on the trail keeping you from accessing the short stretch of road to the trailhead. An outfitter has the snippet of land blocking the public road from the trail, and they have selfishly cut-off everyone from easy access to this public trail. The land holdings are small enough you can go around them, but the terrain is very steep and rugged, so this is difficult and may take hours. There is a trail up Thorn Hollow, but this is brutal with hawthorns. If someone were to cut all of these off the trail it does provide a launch point to get over the ridge. All the access into this trail is so costly, I'm not sure what to recommend for getting on it. Swamp Creek Trail might be the best option, or just drop straight down from the highway.
If you want to go to an isolated place and get bit by a snake, this is a good option for you.