In one embodiment, POI information is received from a first mobile communication device (MCD) of a group of communication devices respectively associated with group members. The POI information includes an identified location to establish a geofence to track activities of the group members at a POI. The geofence surrounding the POI is established based on the POI information. Whether there are changes to the activities of the group of communication devices are determined, where the changes to the activities include a geofence crossing by a group member. A notification is sent to each of the group of communication devices in response to determining that the geofence crossing by the group member has occurred. The geofence crossing indicates an arrival or departure of the group member at the POI. The geofence is resized based on the changes to the activities.