The disclosed embodiments include methods and systems for providing a notification relating to a geographical boundary based on monitored sensor data collected by networked devices. The disclosed embodiments include, for example, a method that monitors positional sensor data received from one or more triggering devices. The method may calculate a first boundary extent delimiting the geographical area of the first boundary based on one or more boundary extent parameters. The method may also detect an occurrence of a triggering condition that impacts a movement of at least one of a client device or at least one of the triggering devices within a geographic region that includes the first location. In response to the detected triggering event, at least one of modified start time or a second location may be established for the event, which may be provided to the client and triggering devices in a notification.