Orran Smith & Nikki Arthur favourites for event
More than 250 runners will be battling Snaefell this weekend as they compete in the Mountain Marathon and Half Marathon.
The action gets underway from Ramsey at 8 o'clock this morning (Sat 29) with the half setting off at 1pm from St Johns.
Nigel Maddox is on the Manx Fell Runners organising committee.
He says the race is all about pace judgement: