Botnsvatnet or Botsvatnet is a lake in the municipality of Valle in Aust-Agdercounty, Norway. The lake is located just north of the lakes Rosskreppfjorden and Kolsvatnet and also to the north of the mountain Urddalsknuten. The village of Valle is located 14 kilometres (8.7mi) to the east of the lake. The lake has an area of 5.61 square kilometres (2.17sqmi) and sits at an elevation of 1,020 metres (3,350ft) above sea level.