The large rock you see to the West is known as a "glacial erratic" and is part of a chain that runs through Alberta, known as the Foothills Erratics Train. They were transported on top of glaciers, and left on the prairie as the glaciers melted. You may be familiar with the Okotoks rock, which is also an erratic but much bigger than this local one!
We call this #1 as we plan to place a few more near some local erratics.