How to Add Bookmarks to Your iPhone Maps
Your iPhone has a Maps app to help you get where you're going. And you can even bookmark maps if you think you'll use them frequently. These bookmarks in the iPhone Maps app let you return to a location without typing a single character.
To add a bookmark to the map, you first have to have a location "pinned" on the Map. You can use the Search feature to enter an address, or quickly drop a pin anywhere on a map:
Tap the curling page button in the lower-right corner of the Map screen.
Tap Drop Pin.
A pin appears when you dropped it.
Press and drag the pin anywhere on the map.
When the pin is where you want it, lift your finger to drop the pin
A banner with the location of the pin (if Maps can figure it out) and a little > in a blue circle appears.
Once you have a pin on your map, you can bookmark that pin like this:
Tap the little > in a blue circle to the right of the location's name or description.
The Info screen for that location appears.
Tap the Add to Bookmarks button on the Info screen.
You may have to scroll down the Info screen to see the Add to Bookmarks button.