I’ve been on about half of the single track referenced. It’s a small area, but great riding and some spectacular views. There’s a really cool creek crossing, and some pretty challenging hill climbs. Plus it’s a short detour on my main route from Bordertown to Stampede.
As far as the name, people from cold springs seem to call it dog valley, the road I usually take is Mitchell Canyon.
Kurt, it definitely depends on the season, and the area. There are decomposed granite slabs and loose sand, there aren’t too many rocks out there. There are some dirt areas as well that can be muddy when wet and a couple of small roots and logs to contend with. Overall, I would say the hill climbs are anywhere from a 2-7 depending on the weather moisture.