Mountain biking is quite popular in Berlin. This is not surprising given cycling’s ubiquity, but bikers have to try a little harder if they want to find any sort of gradient. The best known mountain biking spots in Germany are along the Rhine, but there are also good and less touristy areas around Dresden. Rad and Reisen (www.radreisen.at) is a well-known Austrian tour company that offers mountain biking tours in Germany and a few other European countries. Based on the wikipedia concept, the website www.bikely.com has biking maps used and then plotted by readers.