Echternach E1 – The Mullerthal Classic July 3, 2025December 7, 2025 Jonny Orr3 Comments 14 km - Intermediate A showstopper of a trail from Luxembourgโs oldest city into the regionโs wildest corners: dramatic gorges, high viewpoints, cave lookouts... and a stream that flows uphill? Crowds? Quite possibly. Worth it? Absolutely.