Kajmakčalan (Kaimakchalan), or Kaimaki or Kaimaktsalan or Voras ( or or , ), is a mountain on the border between Greece and North Macedonia. It is the southernmost and highest peak, , of a range known in Greek as the Voras Mountains and in Macedonian as Nidže. The frontier between the two countries runs across the summit. It is the third-highest peak in Greece after Mytikas and Smolikas and the fifth-highest in North Macedonia.