In this thread @arisoft
posted a link to his cool Challenge Checker for your geocaching territory.
I wondered how big these territories get, so it would be nice if you post your territory sizes!
I have one with 206.9 km^2 and one with 121.6 km^2.
Maybe @arisoft can even create a checker with 5km max distance, since 3km is a bit short for sparsely cached areas.