In an approach to sending an alert based on a user's location, one or more computer processors identify a position of a target device as a first location based, at least in part, on data provided by one or more geolocation systems; identify a location category for the first location; determine that the identified location category is among a predetermined set of location categories; identify a time threshold for the identified location category; identify an alert that is associated with the identified location category within the database; determine an amount of time that the target device is present at the first location; and determine that the amount of time the target device is present at the first location exceeds the time threshold, and in response, sending the alert to the one or more recipient devices for the purpose of notifying users of the first location of the target device.