Southeast of Frankfurt, the Otzberg area has a 12 mile mapped trail system over steep rocky terrain. To reach the mountain biking trailhead from Frankfurt, head east on the Autobahn 3 towards Wurzburg and exit onto B45 towards Dieburg/Gross Umstadt. After passing Gross Umstadt, turn right onto B426 towards Otzberg. Park near a soccer field on the right and maps are posted for the numbered trails.
Overall, Otzberg is the 6th most popular mountain bike trail of all 15 mountain biking rides in Germany.