Ljosåbelgen is a mountain in Sel Municipality in Innlandet county, Norway. The 1948 m tall mountain is located in the Rondane mountains within Rondane National Park. The mountain sits about 20 km northeast of the town of Otta. The mountain is surrounded by several other notable mountains including Sagtindan and Indre Bråkdalshøe to the northwest, Bråkdalsbelgen to the west, Smiukampen to the southwest, Hoggbeitet and Steet to the northeast, and Trolltinden to the north.