Switching between location contexts

In general, the subject matter described in this specification can be embodied in methods, systems, and program products for switching between location contexts on a mobile computing device. An estimated geographic location of the mobile computing device is determined by a mobile computing device. A user-identified location is received from an application program invoked on the mobile computing device. The estimated geographic location and the user-identified location are concurrently stored in computer-readable memory. One of the concurrently-stored locations is identified as a current location. A plurality of interface elements that each identify a venue that is geographically near the current location are presented on a display of the mobile computing device. User input that changes the current location from one to the other of the concurrently-stored locations is received at the mobile computing device.