Blåhøa (or Blåhø) is a mountain in the municipality of Oppdal in Trøndelag county, Norway. It is the highest mountain at the northeastern side of the Trollheimen mountain range. The mountain is located in the northwestern part of the municipality of Oppdal, about north of the lake Gjevillvatnet, about west of Nerskogen (in Rennebu), and about northwest of Vognillan.