In reply to UKC Articles:
I love Sawanobori (extended Gill Scrambling?) but I give myself the rule that I have to find the exact source of the river, i.e. the very puddle it begins from. Of course its quite arbitrary as rivers start from square km areas of moorland but its good fun.
I start with a fairly big brook like the one at Crowden and the rule is I have to stay in the water all the way to the source. When I come to a junction I take the branch which has the most water coming down it. On UK moorland it usually ends with about a mile of following a labyrinth of very poorly defined trenches on a moorland plateau until you arrive at a small puddle.
I always thought I had a very odd hobby but I'm glad other people do it! It's great for rainy days or when you want an excuse to walk somewhere.
Crowden brook is a bit of a classic as it involves a long walk in up to waist deep water (actually the easiest access route to some of the local crags!) followed by scrambling and then a plateau walk.
Post edited at 16:17