The Grey Stone of Trough

The Grey Stone of Trough, Trough of Bowland in the Forest of Bowland AONB, Lancashire.
The Grey Stone of Trough at the top of the pass, marks the old pre-1974 county boundary between Lancashire and the West Riding of Yorkshire.
Here, at the head of the pass is the catchment divide between the River Wyre and River Hodder. Raindrops falling on one side of the divide will make a very different journey to the sea than raindrops falling on the other side.