How can I automatically extend edge loop selection? I have a cylinder that I erased some faces near the middle of it on the side like this.


However I when I Alt click the edge of it, it doesn't go completely around the new edge like this: 



What I automatically want it to do is this (I just custom selected all the edges to show you what I mean):



So is there anyway to add edges to the edge loop without clicking every single one?
Since the target edges are all boundaries, there are multiple ways to do this:


AltRMB twice on a boundary extends the selection to all boundary edges.For single boundary loop as shown in the example


Other ways to select boundaries. 


In Vertex Select or Edge Select mode: 3D View menu > Select -> Non Manifold (or press ShiftCtrlAltM).
Or you can first select all elements, then go to 3D View menu > Select > Select Boundary Loop.