Which is the world's shortest river?

Tamborasi River
The Tamborasi River in Southeast Sulawesi, Indonesia, is 20 meters long, 15 m wide and flows into the Flores Sea in Bone Bay. It is a tourist attraction given its forest-clad rocky banks and cool waters, as well as the white sand of the Tamborasi beach at its mouth. It is situated 85 km from the city of Kolaka and is fed by the numerous streams that run through the mountainous Sulawesi province.

Montana's Roe River flows for a mere 201 feet (61 meters) between Giant Springs and the Missouri River. The Roe River was named the world's shortest river in the 1989 Guinness Book of World Records. Before that year, the title had belonged to the 440-foot-long (134-meters-long) D River in Lincoln City, Oregon. Both rivers have been measured at various lengths at different times, and residents in both cities soon disputed which river should rightfully hold the title. In 2006 Guinness opted to avoid the controversy and dropped the category altogether.