You start at the Sickingen-Castle Nanstein, go through the metal gate on the right side of the castle then take a right onto the trail. You will see signs with white arrows on them with 3 colors, blue for easy, red for intermediate and black for advanced. I would definately go for the Black trail. They all go along with each other for a while, with no real technical areas and light hills. There are quite a few roots on this trail and half buried rocks also some loose dirt here and there. Follow the black trail until you see a side trail with some huge rocks you can't miss, that will take you to some descent technical terrain. You will go by a bunker that has 1931 welded onto the steel door that is built into the mountain. Directly after that bunker on the descent, there will be a tree and a small 2 foot jump, be careful if you jump it at speed because the trail turns to the left, if you fall off it is about a 15 foot drop. You will then pass a pond on your right, keep going until the trail hits another pond. This is where I went up hill to the left to start heading back, I probably went the wrong way, but hey, it is all about having fun. I ended up back at the bunker and there is a very steep hill that you can carry your bike up, then you keep going until you see the signs again, which will lead you back to the castle. The sign shows that the trail is 11.8 KM, but like I said, I probably went the wrong way on parts, and it is always more fun to explore. This trail has single track and a fair bit of double track.