How do I juice beetroot?

I have only ever eaten tinned beetroot, so I don't know how to juice fresh ones. I understand that you should always have it combined with other fruit and/or vegetable juices, never on its own. And I am also aware that I shouldn't consume too much. But I have never bought them and do not know where to start if I want to juice them. Do they need to be peeled or just washed? Do I put them through my juicer raw, as if it were an apple? Or, do I cook them first? If I need to cook them, how?