Systems, device and techniques are disclosed for dynamically retrieving and monitoring geo-fence activity. A meta geo-fence may be identified based on a user device geolocation. The meta geo-fence having a radius that is dynamically generated to include previously defined geo-fences within or touching the meta geo-fence. User device geolocation may be monitored in relation to the defined geo-fences included in the radius of the meta geo-fence. A communication may be sent to the user device when the user device reports that the user device has entered or exited one of the previously defined geo-fences within or touching the radius of the meta geo-fence.