Choose route based on grade?

2089377

{"text":"Trying to avoid or minimize steep/hilliest route. I have a couple routes to choose from and we're driving a new (to us) rig home. Is there an app or website that can help with that any of you know of?  \n ","videos":"[]","link":"{}","pics":"[]","canComment":true,"externalShare":false}

2072116

{"replyTo":"","text":"get on c.b. and ax other drivers.","replyToPid":0}

1063546

{"replyTo":"","text":"maybe try a topographical map","replyToPid":0}

936953

{"replyTo":"","text":"Nope, just knowledge and experience.","replyToPid":0}

693114

{"replyTo":"","text":"get out a topographical map an go state by state to make a route Google maps has a feature for that shows big hills an elevation.","replyToPid":0}