Preferred node for read on Availability Group in a multisite configuration
It is possible, but it isn't an out of the box configuration.  What you would need to do is setup a separate DNS named which points to all the secondary servers that you want to route requests to.  Then setup the read only routing to point to that secondary DNS name.  Then assuming that AD is setup correctly when people are redirected to that DNS name they'll always go to the local one.