- Who
- Okotoks Erratic
- What
- 16,500 tonne(s)/metric ton(s)
- Where
- Canada (Okotoks)
The Okotoks Erratic is a glacial erratic boulder near the town of Okotoks in the Canadian Prairies, Alberta, Canada. Glacial erratics are rocks that have been transported by glaciers before being deposited back on the ground as the ice melted. Composed of the metamorphic rock quartzite, this erratic measures around 41 m x 18 m and is around 9 m high. Its mass is estimated at around 16,500 tonnes.
Also know as "Big Rock" by Canadians and as "Okotok" by the Blackfoot Confederacy.