A bit challenging to find, but only about a 30 minute walk to get there if you don't screw up. I live not too far away and always bring visitors here to get into the black forest and walk to an 11th century castle ruine that few people see. The forest is growing over the site, but the burgruine is still easily accessible. There is a hotel/restaurant in Teinach Station, which you will see on the road between Calw and Zavelstein. Park across the street from the hotal and take the trail across the stream and up the hill. Near the top you will see a clearing with signs that point the way to Burgruine Waldeck.
If you own or manage Castle Waldeck, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.