2026「拓路者」第4回桐廬100溯渓トレイルレース（2026「拓路者」第四届桐庐100溯溪越野赛）

The Fenshui River is a river flowing through the south-eastern part of Anhui Province and the north-western part of Zhejiang Province, People's Republic of China. It is a left-bank tributary of the Fuchun River. Its source stream, also called the Houxi, rises at Yunshan Ling north-west of Fangjiawan Village, Jingzhou Township, Jixi County, Xuancheng, Anhui. It winds north-east to Huri Village, Daoshi Town, Lin'an District, Hangzhou, Zhejiang, then turns south-east, and this stretch is also called the Changbei Stream. It passes the Huaguangtan No. 1 and No. 2 hydroelectric stations and the Zhexi Grand Canyon, and after receiving the Changxi Stream on the right at Longgang Town the main course is also called the Changhua Stream. Continuing south-east, after the Tianmu Stream joins on the left east of Zixi Village, Qichuan Town, the main course is first called the Fenshui River. The main stream continues south-east through the Fenshui River Reservoir, Fenshui Town, Yaolin Town, Hengcun Town and Jiuxian Subdistrict in Tonglu County, and finally joins the Fuchun River at Dongmen Wharf, Tongjun Subdistrict, in the county seat of Tonglu. The river is 164 kilometres long, its drainage basin covers 3,444 square kilometres, and its average annual runoff is 3.18 billion cubic metres. The Fenshui River basin is one of the centres of heavy rainfall in Zhejiang Province and is prone to flooding.<