Castleton is generally considered a very safe destination for solo female travelers. It's a small and charming village located in the scenic Peak District. The locals are friendly and willing to assist tourists whenever needed. Like with any destination, normal precautions should always be taken, but the likelihood of experiencing any serious safety issues here is very low. Crimes are extremely rare, and in terms of personal safety, it is very secure. Remember to respect local customs and traditions for a smooth and enjoyable visit.