Fishing a Wire to A Pillar

I just upgraded my factory radio and would like to put the bluetooth microphone above the driver's visor. Can anyone give me any tips or wisdom regarding fishing a wire from the radio then behind the instrument cluster and to the A pillar?
Thanks.

 

You can fish it. Or you can run it from behind the radio and down under the dash and zip tie it along the dash. Then you can slide it in between the rubber seal and the plastic on the pillar.

 

It's easier to fish the wire from the A-pilar down. Remove the A-pilar by undoing the two tabs, then unscrewing the two screws underneath. The whole thing jus comes right off. At that point, take off the plastic by the door and the bigger plastic piece that covers the kick panel. You'll be able to see the wire there

 

Thanks for the information guys. I'll start tearing things apart and see how it goes.