Songpa Dulle-gil is a 21km loop hiking course in Seoul that links the waterways of Seongnaecheon, Jangjicheon, Tancheon and the Han River along the outer edge of Songpa-gu. Most of the route follows flat waterway paths for walking and cycling, and in spring it passes cherry blossom roads and long tree tunnels. The course is divided into four sections: Seongnaecheon at 6km, Jangjicheon at 4.4km, Tancheon at 7.4km and the Han River at 3.2km. A full loop takes about 5 hours 30 minutes and connects to Olympic Park, Bangi Wetland and Garak Market.