Run or bike in the Erzgebirge/Vogtland Nature Park and in the World Heritage Ore Mountains mining region over three dam walls, in beautiful green forests and through chic little villages - as far as you like, and when it suits you.
Start however you like. The "Drei-Talsperren-Marathon" comprises 3 running routes and 3 cycling routes for mountain bikes. They all run on forest paths or roads and are well signposted. You can run or cycle them at any time during the snow-free seasons. It's easy to do with your smartphone.