Snaking down a Welsh mountain, featuring nerve-jangling jumps and screeching turns, the Hardline course is reputed to be the toughest downhill mountain bike track in the world, a severe test of body and mind for the boldest riders.
Until now it has been a male preserve, but this year a group of women from the UK, New Zealand, Canada and Argentina have joined the men hurtling through the forest at up to 40mph (64km/h), determined to show that this toughest of tracks is not just for the boys.