We started near Siegelbach and rode East towards Worms. We rode for two hours and then turned around and road back. It's a very nice ride. The hills are not very challenging and the trails aren't technical at all. There were plenty of places to stop to take pictures and to get a beer if you desire. We turned around at the far end of Ramsen.
A mountain bike is nice to have because the trail isn't all paved. A cyclo-cross bike would be fine too.