A slightly less well known feature of Google is “Google My Maps”, which lets you create and share your own routes and maps.
To do this, download the official Google My Maps app from the Google Play Store.
After starting the app, you’ll be asked to associate the app with a valid Google Account (if you have multiple).
Then you are on the overview screen where your saved maps and routes are displayed.
If you are using Google My Maps for the first time, you will of course receive a message that no maps have yet been created.
To create a new personal route, click the + icon at the bottom right.
See picture (click to enlarge)