Yes, I also distinctly remember going up a steep hill on the right side of the road. But wait -- you remember a steep hill BEFORE Soldón, and my memory is that it is AFTER Soldón, that you cross the river and ascend to the highway and then go up on a sort of steep path on the side of the road while the road stays low.
Now I'm really not sure what to do.
When
@Charrito or Kinky get back on, they may have some more info.
p.s., Mike, I scrolled quickly through some of your Invierno posts and couldn't find a link to your blog. Is it available for viewing on the chance that it has more gems for the 2018 guide?