St. Mary Reservoir
49.3208° N, 113.2117° W
St. Mary Reservoir, Alberta. 49.3208° N, 113.2117° W
Not for navigation. Depths are from government surveys and may be outdated.
borealbound.ca/lakes/ab/st-mary-reservoir/, compiled October 9, 2026
- Canadian Geographical Names Database, Natural Resources Canada. Contains information licensed under the Open Government Licence – Canada.
- HydroLAKES v1.0, Messager et al. 2016 / WWF HydroSHEDS. Licensed under CC BY 4.0.
- Census boundaries and population, 2021, Statistics Canada. Adapted from Statistics Canada. This does not constitute an endorsement by Statistics Canada.
- City page weather forecasts and alerts, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).
- Air Quality Health Index observations and forecasts, Environment and Climate Change Canada. Contains data from Environment and Climate Change Canada (ECCC Data Servers End-use Licence).
St. Mary Reservoir covers 29.2 km², Alberta. It lies 13 km northeast of Cardston.
- Area
- 29.2 km²
- Shoreline
- 95.2 km
- Elevation
- 1,090 m
Today on the water
Sun and moon
- Civil dawn
- 7:13 a.m.
- Sunrise
- 7:44 a.m.
- Sunset
- 6:54 p.m.
- Civil dusk
- 7:26 p.m.
- Moonrise
- 6:42 a.m.
- Moonset
- 6:14 p.m.
- Moon
- Waning crescent, 1% lit
Air Quality Health Index
2 low risk
Lethbridge, as of 8:00 a.m. MDT