Mount Sabyinyo is the oldest volcano of the range.

The summit of the mountain, at 3,669 metres (12,037 ft),[3] marks the intersection of the borders of the Democratic Republic of the Congo (DRC), Rwanda, and Uganda, and holds religious significance for local tribes.

Sabyinyo are a habitat for the critically endangered mountain gorilla.

[4][5] The mountain carries the local nickname "Old Man's Teeth," because its serrated summit resembles worn teeth in a gum line (in contrast to the perfect conical summits of the adjacent mountains in this range).

[6] The peaks of Mountain Sabyinyo,[7] can be easily done and accessed and trekked along the foothills from the side of Mgahinga National park in Uganda.