|Location||Banff National Park, Alberta, Canada|
|Primary inflows||Peyto Creek|
|Primary outflows||Mistaya River|
|Max. length||2.8 km (1.7 mi)|
|Max. width||0.8 km (0.50 mi)|
|Surface area||5.3 km2 (2.0 sq mi)|
|Surface elevation||1,860 m (6,100 ft)|
Peyto Lake (// PEE-toh) is a glacier-fed lake in Banff National Park in the Canadian Rockies. The lake itself is near the Icefields Parkway. It was named for Bill Peyto, an early trail guide and trapper in the Banff area.
During the summer, significant amounts of glacial rock flour flow into the lake from a nearby glacier, and these suspended rock particles are what give the lake a unique bright, turquoise colour. Because of its bright colour, photos of the lake often appear in illustrated books, and the area around the lake is a popular sightseeing spot. In 2021, Parks Canada completed improvements to the lake viewpoint, trails and parking areas. The lake is best seen from Bow Summit, the highest point on the Icefields Parkway.
The lake is fed by Peyto Creek, which drains water from Caldron Lake and Peyto Glacier (part of the Wapta Icefield). Peyto Lake is the origin of the Mistaya River, which heads northwest from the lake's outflow.
- "Lake Louise to Bow Summit". canadianrockes.net. Retrieved 2020-11-19.
- W., Boles, Glen (2006). Canadian mountain place names : the Rockies and Columbia Mountains. Laurilla, Roger W., 1959-, Putnam, William Lowell., Putnam, William Lowell. Place names of the Canadian Alps. Calgary, Alta.: Rocky Mountain Books. ISBN 9781894765794. OCLC 244770225.
- "Improvements at Peyto Lake". Parks Canada. Retrieved 7 October 2021.
- Peyto Lake, The Canadian Rockies Archived 2008-04-22 at the Wayback Machine
- MISTAYA CANYON and PEYTO LAKE: Banff National Park, Alberta, Canada: ALONG THE ICEFIELD PARKWAY