Your custom map will open in a new Google Maps window.Select Your places from the pull-down menu.From the top-left corner, click on the hamburger menu.Navigate to Google Maps and sign in to your Google account.To create a custom route on Google Maps using Windows or macOS: How to Make a Custom Route on Google Maps on Desktop (Windows or macOS) Since some of the Google My Maps features are not currently available via iOS devices this article will be covering mostly Windows, macOS, and Android. This article will include steps for the various map customization options, including how to save and share your route. If you want to know how to create a custom route on Google Maps, we’ve detailed the steps in this article. The Google My Maps tool lets you build custom routes when you want to pre-plan your trip and have offline access whilst traveling.