Each route reaches the paths of the southern or northern circuits, which circle the Kibo dome. Only three main routes continue all the way up to the summit, and take 5 to 8 days to complete. At present there are more than 80 official guides. They are not park employees, like the rangers or rescuers. Once you have chosen your own it is customary to arrange any aspects of the climb with him first, including tipping.
Porters are independent too.
If you wish to perform the ascent with a little more comfort, you may need a few of them, usually one or two for every trekker. Although you can hire it, it is much better to bring your own. Please see the equipment list page for further details.