Sponghøi is a mountain in Skjåk Municipality in Innlandet county, Norway. The 1698 m tall mountain is located in the Tafjordfjella mountains and inside the Reinheimen National Park, about 34 km northwest of the village of Bismo and about 23 km northeast of the village of Grotli. The mountain is surrounded by several other notable mountains including Storhøa to the north, Digerkampen to the southeast, Dørkampen to the southeast, Høggøymen to the southwest, and Benkehøa to the northwest.