It's a 500+km circular route through Wales, that should hopefully be both challenging and enjoyable depending on your definition of both words. It could be started from any point but there are train stations at 4 points, so you can let the train take the strain should you wish.
As you can see, it goes both up and down, so those who don't like climbing needn't worry.

A final test ride to complete before putting it into the public domain.