After coming out of Death Valley, I drove north on the eastern flank of the Sierra Nevada Range for a couple of hundred miles. The only way to pass the mountain range to go west is through Tioga Pass, which leads to Yosemite NP. However, this road was still closed. I had driven through this pass in two occasions many years ago, and at 10,000 ft there was still snow and ice on the lakes in June/July!
So, I chose to cross the range on CA-89, which was south of Lake Tahoe. This was a steep road too, and even narrower and more winding! Again, if my motorhome overheated or its transmission failed, I would be in deep doo-doo.
Again, they did not post the grade of CA-89, but my estimate is that it is perhaps as high as 15% in many sections.
But, but, what was scarier was when I came to the intersection of CA-89 and CA-4, and what did I see but a sign posting a grade of 24%!
Thank goodness, I took the other fork, and did not have to subject my motorhome to possible failure. I did not have the chance to take a photo of that road sign, but was able to see that on Google Street View. See the link below.
https://www.google.com/maps/@38.660...ata=!3m4!1e1!3m2!1seaYgaEFlaRE9otjO2FDb-w!2e0