The Paris-Roubaix Challenge is an amateur race that rides the pro route before France's famous one-day cobbled classic (sometimes the day or sometimes the weekend before the main event, depending on how the dates fall).
There are usually three different routes to choose from – the full pro course and two shorter versions. All usually feature cobble stone sections.
The Paris-Roubaix Challenge website is excellent, carrying (in English, French and Dutch) information about all three routes, including registration details and links, start/finish info, rules, entry fees, and much more.
If you need bike hire, you should arrange this ahead of time, though a small number of rental bikes are available on the day via the organisers. See our Paris-Roubaix bike hire page. See here for a reader Q&A on tour companies running supported Paris-Roubaix rides.