How to remove guides in Apple Maps on my iPhone?

Hello mudkat,

You can try turning of Siri Suggestions for the Maps app to see if that would help in this situation:

Change Siri settings on iPhone

Change Siri settings for a specific app

You can change which apps you can use with Siri, as well as the Siri Suggestions and Siri Shortcuts settings for any app.

1. Go to Settings  > Siri & Search, then scroll down and select an app. (Maps)

2. Turn settings on or off.

You can also check out this article on Map Guides:

Organize places in My Guides in Maps on iPhone

Thanks for using the Apple Support Communities, and have a great day!