The Thielle River is a small river located in the Canton of Neuchâtel in Switzerland. It flows for approximately 20 kilometers, starting from the Lake of Neuchâtel and eventually joining the Aare River. The river is known for its picturesque surroundings and is a popular spot for outdoor activities such as hiking and fishing. The Thielle River plays an important role in the local ecosystem, providing habitat for various species of fish and wildlife. Its waters are also used for irrigation and contribute to the agricultural activities in the region. The river's scenic beauty attracts both locals and tourists, making it a cherished natural resource.