Trollsteinrundhøe is a mountain in Lom Municipality in Innlandet county, Norway. The 2170 m tall mountain is located in the Jotunheimen mountains within Jotunheimen National Park. The mountain sits about 18 km south of the village of Fossbergom and about 36 km southwest of the village of Vågåmo. The mountain is surrounded by several other notable mountains including Finnshalspiggen, Gråhøe, Svartholshøe, and Nørdre Trollsteinhøe to the north; Smådalshøe to the northeast; Grotbreahesten to the east; Trollsteineggi and Glittertinden to the south; and Lauvhøe to the northwest.