I used Google’s “My Tracks” software on my phone to capture the route and provide statistics. They also provide elevation gain, which I leave off due to the fact that it is so inaccurate. The mapping itself is impressive, even if it does look like I am going through people’s yards at times. It is just the limits of the GPS accuracy. When I provide elevation, it is taken from Google Earth and is approximate.
I would encourage you to open the maps. While you can navigate within the web page, it may not immediately show you the entire route. If the map opens in Google Maps, you can use your phone GPS to confirm that you are on the directed path.
Also be sure to use the street view option to help clarify anything that seems confusing. There are few times on the walks where street view is not an option.