We don't need to tell you just how hard a race Paris-Roubaix is...so we thought we'd show you instead

These pictures of the Paris-Roubaix cobbles, taken by Strava photographer Berntrand Trichet, show just how rough, irregular and muddy the cobbles are at this time of the year.

Riding them in fine weather is hard enough, but douse them with water and the challenge grows even more, so take a look at some of the toughest of the 27 cobbled sectors in pictures.

>>> Who holds the Paris-Roubaix Strava KOMs?