Ridderronde Maastricht is held in the country that  borders what country on the east?
Ridderronde Maastricht Ridderronde Maastricht is an elite men's and women's professional road bicycle racing event held annually in Maastricht, Netherlands. The first edition was in 1985 and since 2008 the event also includes a women's race.
Roerdalen Roerdalen ( ) (Limburgish: "Roerdale" ) is a municipality in the southeastern Netherlands, in the province of Limburg. As of 2007, it had about 21,000 inhabitants and borders Germany.