Well, I drove the route today just to see what it is like.

I don't think there's more than about 0.5 of a kilometer that's flat. It's very gently up and down to the first time I drop into the valley ... and climb back up. Then it rolls for a bit, then starts to gradually climb, until the second time I drop into the valley ... and climb back up. That climb is a good kilometer or more and probably about a 8-10% grade. Then it continues to roll the rest of the way until it finishes with a gradual climb to the plant.

On the way back, the first valley I reach has a climb of about 1.5 kms long at an 8-10% grade, then it just keeps going up more gradually for the next 5 kms before I finally reach the top and plunge down to the city where I live, up and over some more rolls, down into the valley, along the river, and back up and out of it.

It's beautiful, but looks like it will be quite a challenge!!