Khumbu is generally considered safe for solo female travelers. Most of the locals are welcoming and respectful. Due to its popularity as a trekking destination, there are usually plenty of other travelers around. It's essential, however, to stay aware and informed, particularly when hiking alone. Nepal as a whole is known for its hospitality and respect towards visitors. Nevertheless, it's always a good idea to follow basic safety precautions such as not venturing out alone at night and keeping valuable items secure.