Reinstinden is a mountain in Lom Municipality in Innlandet county, Norway. The 1756 m tall mountain is located in the Jotunheimen mountains within Jotunheimen National Park. The mountain sits about 43 km northeast of the village of Øvre Årdal and about 50 km southwest of the village of Vågåmo. The mountain is surrounded by several other notable mountains including Høgtunga to the south; Storådalshøi to the southwest; Hinnotefjellet, Semeltinden, and Søre Hellstugutinden to the west; Nestsøre Hellstugutinden, Store Hellstugutinden, and Nørdre Hellstugutinden to the northwest; Store Memurutinden and Austre Memurutinden to the north; Blåbreahøe to the northeast; and Surtningssue and Raudhamran to the east.