from the Werder train station to be Lehnin monastery it should be only about 18 km on the Fontane Radweg. But the signalization was not good and we ended up riding at least 34 or 36 km to get there in the way getting lost many times and going, often with quite a bit of effort through forests sands etc. we also saw amazing things like Kraniche birds eating up before their trips to the southern hemisphere from not far and beautiful Forest. after the UferCafe (beautiful on a lake) we really had move fast because even if the road would be without problems or delays it would be 19 km the Werder train station. the first 6 km or so were rather slow really on the forest as most of the kilometers we had done when we were lost on the way there. but we made it - left it 3:00 p.m. and arrived at the train station around 4:35 exactly as his sun was setting (know that you could see it because there was really no sun out). an amazing day! active calories c 1650 according to Garmin watch approximately.