At the bottom of County Line Road is the junction with Kaiser-Aetna Road and Orestimba Creek Road (I follow the latter).
The trip down the hill was beautifully shaded (light dappled shade) much of the way and happened so quickly that I didn't get any good photos on the way down.
It's 14h45 and I've got about 7 miles to go to reach Jackrabbit Lake, much of it flat.
I can see from the sign here that I've come 4.2 miles so far since leaving Mississippi Lake.