Herning is a picturesque and very safe city for solo female travelers. Denmark, in general, is renowned for its peace, safety, and the respectful nature of its citizens. With low crime rates and safe public transportation systems, you can comfortably navigate around Herning even at night. It is recommended though, like anywhere else, to follow general safety measures like keeping personal belongings secure and staying in well-lit, populated areas. Always trust your instinct in any situation.