Rhinelander is generally considered safe for solo female travelers. Most areas are well lit and populated, even during the night. It's always advised to adhere to standard travel safety precautions like being aware of your surroundings, especially in unfamiliar areas. The locals are typically friendly and willing to assist. However, it's important to keep in mind that like any location, isolated areas can pose potential risks, and emergencies can occur, so it's best to stay connected and informed.