context: Despite the turbidity of the water, boating is exceptionally good, as river dredging carried out in the 18th and 18th centuries has reduced the number of rocks and the water level of power stations has eradicated rapids. The power plants prevent long boat trips, but the lightest watercraft can navigate the river fairly unobstructed and circulate the power plants along designated circuits. The distance from Tyrvää power plant or Kokemäenjoki bone to the Äetsä power plant is 12 km, from Äetsä to Kokemäen Kols power plant, 45 km, from Kokemäki to Harjavalta Lammainen power plant, 27 km from Harjavalta to Pori and further 15 km to Mäntyluoto. The total distance is about 121km, which is the total length of the river. A guided canoeing route has been made to the Kokemäenjoki River, a guide of which is still available.
question: How Long is the River Kokemäen?
answers.text: 121km