Abstract: A system for dynamic geofence determination for trip navigation comprises an interface and a microprocessor. The interface is configured to receive data for one or more trips. The microprocessor is configured to determine an initial node for each trip based on the data; determine an initial time window for each trip associated with the interface; and determine a dynamic geofence for the initiation of each trip. A dynamic geofence is operable only during its initial time window. The system may have a location sensing device, such as a global positioning system. Trips may be automatically initiated when the interface is within a dynamic geofence during its initial time window.