Located southeast of Kinloch Rannoch in Perth and Kinross, this mountain (1083m / 3552 feet) appears to have a perfect conical appearance from the west and east, whereas from the north and south it appears as a whale-backed ridge. Composed of quartzite, the ground is rough for walking. The peak was in the past used as part of a scientific experiment by the Astronomer-Royal, Nevil Maskelyne (1732 - 1811). He measured the deflection of a pendulum on the slopes of the mountain to determine the mass of the earth.
The majority of the mountain is now owned by the John Muir Trust who, through a programme of conservation and management, intend to preserve it for future generations.