Hi SWHayward,
Thank you for participating in the Apple Support Communities. We understand you'd like to delete a favorite location in Maps. This article explains how: Save a favorite location in Maps on Mac - Apple Support.
"Delete a favorite location
- In the Maps app on your Mac, Control-click a location (in the sidebar below Favorites), then choose Remove from Favorites."
This article explains how to remove a pin if needed: Mark a location with a pin in Maps on Mac - Apple Support.
"Remove a pin
You can remove a pin that you drop.
- In the Maps app on your Mac, scroll in the map to show the location you marked with a pin.
- Choose Edit > Remove Pin.
- You can also Control-click a pin, then choose Remove Pin."
We hope this helps.
Take care.