Thimphu is generally safe for solo female travelers. Bhutanese people are known for their kindness and respect towards everyone, including foreigners. The place has a low crime rate and even the smallest incidents are taken seriously by local authorities. However, as a solo traveler, it is always advised to be cautious, especially during nighttime. Basic safety precautions like avoiding poorly lit areas and providing someone else with your itinerary can go a long way towards ensuring your safety.