You can get elevations and grades from Google Earth.
1. Click on Directions
2. Enter pt A and pt B click on the icon
A blue line will appear for your route
Left click on the route ... a drop down menu appears
Click on [elevation]
A small window will open underneath your route ... as you move the cursor along it will give the elevation and grade along with a synchornized arrow on the route.
I also use Mountain Directory West for Truckers, RVs and Motorhomes ... I bought it after my wife encouraged me to take a route that I wished I had the directory before I decided to listen to her ... but we are still married ... and we laugh about it now ... but not at the the time ...
There are also truckers atlases available that gives clearances, elevations, and grades. These are available at most truck stops.
2004 Winnebago Journey 39W - 2012 Buick Enclave
Present @home Home: Oshkosh, WI
We call our rig "Ernie the Journey"