True to the motto: "You've only really been where you've been walking". (JWvG), some GuD colleagues set off early on Saturday for a big hike, with a choice of 30 or 55 km. The 30 km group walked clockwise around the Müggelsee lake at a light pace and in good spirits. With the best hiking weather, lots of cake and good conversation along the way, the finish line was crossed after about 7 hours and the day was evaluated at sunset. For the 55 km group, the focus at this point was still on getting around. In addition to the beautiful lake and river landscape, we were also able to catch a glimpse of the new Tesla factory - through a cutting in the primeval forest of Brandenburg - as the loop led right up to the Berlin ring road. After about 48 km, the climb to the Müggelturm was on the agenda once again. After about 12.5 hours, the last riders finished and were able to put their feet up.