I would stick on highway 58 until you hit the 14, then go North to the merge with 395, and take 9 mile. I've heard stories about that way, and a little extra straight flat highway miles are nothing. Not tellin, just sayin.
Yea that may be advisable as it looks like KM might be on the other side of the crest and the road cleonard linked looks pretty dam twisty. I'll have to see how other people go from the North.