Forollhogna (or Forolhogna) is a mountain located on the border between three municipalities in Norway: Midtre Gauldal and Holtålen (in Trøndelag county) and Os (in Innlandet county). The 1332 m tall mountain Forollhogna is the highest mountain inside Forollhogna National Park. The mountain is about 27 km southeast of the village of Enodden in Midtre Gauldal and about 30 km northwest of town of Røros.