The trail is the extension of the trail in the Röthenbachklamm. It is worth sticking to this piece. The sandy section is short and can be found at the eastern end, here it is difficult to avoid getting off.
Nice trail flowig along the pond and the Röthenbach. Changing ground from sand over firm forest floor to the root path should not be a problem for MTB riders, S0 / S1. In some places very narrow, take care of hikers and cyclists.