Skinnies? Looks like an awesome route.
Yes, the road is called Haul, I believe. It's an awesome ride about 1 or 2 percent into the park on a gravel road through the redwoods. Dirt is a little over 20 minutes. Highly recommend it.
Old Haul looks like a fabulous road -- never done it, but now it's on my bucket list. Thanks for bringing this to our attention.