Kill the Hill
Steffi connected me with an informal mountain bike race happening in the Müggleberg forest shortly after my arrival in Berlin. It was a fun format: no timing, just a figure-8 loop through the forest, winners counted by number of lapss. There were three unis (me, Lena, and Finn), and maybe 12 bikes. The start/finish line was near the top of the hill, so after the race we got to ride the Müggelberg North Shore structures on the way down. They gave a fairly tame park (114.7m elevation, highest real hill in Berlin) some spice.