It starts in Chepstow at the Bulwark community hall
You will need a good coat of creosote if the weather is like it was last year
It's not too bad difficulty wise for a 400km in Wales. The first bit to Hay-On-Wye is pretty easy. Then you go to Landovery, again not taxing. After this it gets more difficult as you go to the coast and then out again and back to Landovery. After Landovery the second time is my favourite bit of the ride. It's night and there is a lot of blasting up empty A roads. The Brecon bypass is fabulous.
The worst bit is the final climbing after Usk, just seems to go on forever.
Not a favourite ride of mine but has some good bits, I've done it 3 times but not again this year.