As of the end of May 2017, the castle can be visited. At the donjon is indeed a scaffolding and this one can not commit. The rest of the castle is walkable and definitely worth the beads of sweat, which you shed when you climb there. The view, among other things on the Trifels is just beautiful.
Unfortunately, this ruin can not be visited until further notice, as damage to the building fabric has been detected and it has now been blocked for reasons of traffic safety. This information comes from the homepage of the "Association of Palatine Climbers e.V.", PK for short: pfaelzer-kletterer.de/content/_inhalt/news/new14.htm#apr2015_1
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