There’s that much singletrack in Epping that in the years I rode there I don’t think I ever did the same ride twice. I seriously recommend going out & getting lost, which is what was told to me when I first started riding because the truth is you can’t actually get lost especially if you know the roads all around it.
Don’t forget the forest goes all the way down to Forest Gate in East London, but as mentioned here it ‘closes’ soon so better be quick coz unless u have a SS don’t even bother once the mud comes.