CA 175

I have never driven 175 but according to Cal Trans Motor Home Map, part of it is shown as a RED route, which means Motor homes 40 ft and longer are prohibited. That alone tells me it is probably narrow and winding and I am not going to take that road even in my 32 ft MH towing a CRV. Here is the link, when the map comes up, click on number 1 and find 175.

Cal Trans map

On edit, I just noticed a note on the map, no vehicles over 39 ft allowed on 175, scroll down and read at the bottom of the page. Use your own judgment on this one.