Divided in three section, this event is based in Bangor and includes all Welsh mountains above 3000 feet (914 metres): Snowdon, Garnedd Ugain, Crib Goch, Of Elidir Fawr, Y Garn, Glyder Fawr, Glyder Fach, Tryfan, Of Pen yr Ole Wen, Carnedd Dafydd, Yr Elen, Carnedd Llewelyn, Foel Grach, Carnedd Gwenllian and Foel Fras.
The race begins at 5am and the 8pm briefing the evening before is compulsory as is maintaining a vegan diet during the event.
There are two food and drink Aid Stations at Nant Peris and Ogwen (Gen Dena Farm).
Drop bags (two) are allowed and their will be spot tests to check adherence to mandatory kit.
There is a cut-off time of 15:00 at Carneddau.