Tonsa

{{Short description|Mountain summit in Canada}}

{{Infobox mountain

| name = Tonsa

| photo = Tonsa from Lower Minnestimma Lake.jpg

| photo_caption = Tonsa (center) seen from Larch Valley flanked by Mount Bowlen on left and Mount Perren on right

| elevation_m = 3053

| elevation_ref = {{cite bivouac|id=1574|name=Tonsa Peak|access-date=2018-12-12}}

| prominence_m = 173

| prominence_ref=

| range = Bow Range
Canadian Rockies

| parent_peak = Mount Bowlen (3,072 m)

| listing = {{unbulleted list

| Mountains of Alberta

| Mountains of British Columbia}}

| country = Canada

| region_type = Provinces

| region = {{enum|Alberta|British Columbia}}

| part_type = Protected area

| part = Banff National Park

| map = Alberta#British Columbia#Canada

| map_caption = Location in Alberta##Location in British Columbia##Location in Canada

| label_position = right#left

| mapframe = yes

| mapframe-zoom = 8

| mapframe-caption = Interactive map of Tonsa

| coordinates = {{coord|51|17|51|N|116|12|00|W|type:mountain_scale:100000|format=dms|display=inline,title}}

| coordinates_ref =

| topo_map = NTS {{Canada NTS Map Sheet|82|N|08}}

| first_ascent =

| easiest_route =

}}

Tonsa, or Tonsa Peak, is a {{convert|3053|m|ft|0|adj=on}} mountain summit located on the border of Alberta and British Columbia on the Continental Divide in the Canadian Rockies. The mountain forms part of the backdrop to Moraine Lake in the Valley of the Ten Peaks of Banff National Park. It was named in 1894 by Samuel E.S. Allen for the Stoney Indian word for the number four. {{cite peakfinder|id=1408|name=Tonsa|access-date=2019-09-24}}