Route description:
From start head up the road, bear right onto track and through tunnel under canal. Keep straight on up the old cart track then eventually to fields (going over 2 stiles). Follow the marked path straight up through fields. When on the open fell above the intake wall, bear right and then follow the path directly up the north face. Once at the blockhouse, after the steep section, continue straight on up to the trig point (checkpoint and marshal 1).
Now run back the way you have come almost to the blockhouse but bear right down the track the follows the rim of the steep north face. Turn left at the marker and descend steeply straight down the hill on a mixture of shep-trods and mtb paths till you reach the intake wall (checkpoint and marshal 2). Turn left and run back to the stile you were at before into the fields. Descend directly the same way you came up to this point.  

Are you a newbie to fell racing (or lack experience/confidence)? The colour chart below may help - generally the more that is  coloured to the left of the grid means easier (green and blue colours).
This fell race like most others is a completely different proposition in poor weather.  Not only do you need to be better prepared with clothing etc, but the terrain will be more challenging in wet and slippery conditions. The route is not marked some ability to navigate in the mist/fog is required when the cloud is low.
However, on a warm fine day the challenge of the route is minimal.