Slettmarkhøe is a mountain in Lom Municipality in Innlandet county, Norway. The 2190 m tall mountain is located in the Jotunheimen mountains within Jotunheimen National Park. The mountain sits about 37 km northeast of the village of Øvre Årdal and about 27 km northwest of the village of Beitostølen. The mountain is surrounded by several other notable mountains including Store Svartdalspiggen and Mesmogtinden to the east; Langedalstinden, Kvitskardtinden, and Torfinnstindene to the southeast; Slettmarkpiggen and Slettmarkkampen to the southwest; Snøholstinden and Store Rauddalseggi to the northwest; and Storådalshøi to the north.