The pack of riders cycles during the men's elite race of the Liege-Bastogne-Liege one day cycling event, 258,5 km round-trip from Liege via Bastogne. (Photo by JASPER JACOBS/Belga/AFP via Getty Images)

Liege-Bastogne-Liege

Liège–Bastogne–Liège, also known as La Doyenne (“The Old Lady”), is a one-day classic cycling race in Belgium. First run in 1892, it is the oldest of the five Monuments of the European professional road cycling calendar; usually coming as the last of the spring classics. It is held annually in late April, in the Ardennes region of Belgium, from Liège to Bastogne and back. It is considered one of the most arduous one-day cycling events in the world because of its length and demanding course.

Tinkoff-Saxo team Slovakian cyclist Peter Sagan rides during the 113th edition of the Paris-Roubaix one-day classic cycling race in Compiègne. LIONEL BONAVENTURE/AFP via Getty Images

Paris-Roubaix

Paris–Roubaix is a one-day professional bicycle road race in northern France, starting north of Paris and finishing in Roubaix, at the border with Belgium. It is one of cycling’s oldest races, and is one of the ‘Monuments’ or classics of the European calendar, and contributes points towards the UCI World Ranking.