Eislek Gravel Luxembourg

A two-part, 46.8 km circuit links Luxembourg and Germany, with routes of 115 km (~1,820–1,995 m elevation) for younger groups and 70 km (~1,100–1,199 m elevation) for men 60+ and women 50+; it features cobblestones to Vianden Castle, forest gravel, and a greenway along the Our.