Tonsa

Tonsa is a mountain peak in the Canadian Rocky Mountains that forms part of the Continental Divide. It rises above the surrounding landscape as one of several summits that frame Moraine Lake in the park.

The peak was named in 1894 by Samuel E.S. Allen, drawing from the Stoney Indian language where the word means the number four. This naming was part of a systematic effort to identify a group of summits in the area.

The mountain stands as part of the Ten Peaks that create the natural frame for Moraine Lake, a central feature of Banff National Park.

The peak requires alpine experience and proper equipment as conditions can be harsh and changeable throughout the year. Visitors should assess their skills realistically and seek local guidance before attempting the climb.

The summit sits on a geographical divide where water flows in two opposite directions. Precipitation falling here feeds two separate river systems, one flowing east and one flowing west.