For reasons still unknown, the Swiss man, who was familiar with the area, stumbled and fell down a slope, according to the cantonal police.
The hiker was hiking with a companion, wrote the Appenzell Innerrhoden cantonal police in a statement on Friday night. Despite immediate assistance from the companion, the rescue services were only able to determine the man's death.
The accident occurred on a mountain meadow. The two hikers wanted to descend to the mountain hut via a meadow above the Widderalp hut, according to the police.
The exact cause of the accident is being investigated by the cantonal police on behalf of the public prosecutor's office in Appenzell Innerrhoden.