How can my list sync with geocaching.com?

Step 1
Choose your list on geocaching.com or create a new one:
www.geocaching.com/plan/lists

Step 2
Click the plus (+) icon in the top-right corner of the options bar.

Step 3
Select "Add bulk GC Codes" and copy the GC Codes in the text box above into the text box on geocaching.com.

Step 4
Click on "Add geocache". Now all geocaches are in your list on geocaching.com and you can search and find them.