The trek to the top of Gunung Mulu is not to be taken lightly.
It requires a lot of walking -- sometimes up to eight hours in a day.
The whole trek is 24 kilometres long and reaches an altitude of 2,377 metres; my maths isn't great but that's a whole lot of steep.
You will be sleeping in basic conditions in camps along the way and share the cooking duties with your guide.
This is perhaps the most difficult â€˜walk' at Mulu and I can't stress enough how fit you have to be for this trek. Leave the kids at home for this one.
The trip leaves daily at 09:15 and takes four days and three nights.