Svartdalshøi is a mountain in Lom Municipality in Innlandet county, Norway. The 1671 m tall mountain is located in the Breheimen mountains within the Breheimen National Park. It is located about 26 km southwest of the village of Bismo and about 17 km west of the village of Elvesæter. The mountain is surrounded by several other notable mountains including Merrahøi to the west, Vesldalstinden and Holåtindan to the northwest, Steindalshøi and Hestbrepiggene to the northeast, and Steinahøfjellet to the east.