Anybody ever use Google Earth? Check this out.
This function can be used to navigate around high altitude grades or at least, become more aware of them!
Top left hand side under the search bar select "Get Directions" Type in your beginning and end point for the trip. A fixed purple line will appear with a suggested route. Unlike Google Maps you cannot drag and drop the route line, it's fixed. But here is the bonus, right click on the line and select "Show Elevation Profile" up pops a graph representation showing the elevation profile on the route. Now drag the vertical line left and right back and forth along the graph. The information provided gives the altitude, the % of grade, the location in miles and a corresponding red arrow on the map to show where it is located.