Hayward, US offers a moderate level of safety for solo female travelers. While the city has a number of safe and welcoming neighborhoods and is generally navigable with basic precautions, like any urban setting, it does have areas where caution is advised, particularly after dark. Public transportation is reliable and there are plenty of potential places to visit, shop, eat, and enjoy culture. However, even though crime rates are not extraordinarily high, it's always important to stay aware of your surroundings, avoid inconspicuous areas, and maintain standard precautions such as not displaying expensive belongings openly and keeping emergency contact numbers at hand.