... and well beyond, Sir Charles! The above postcard image is attributed to 1912, and i have seen very similar views from as late as the 1920s. Scenes like this seem to have bee photographed quite frequently, perhaps because the subject was at least moderately interesting, while the static nature of the group lent itself well to getting a nice group shot with the bulky and slow cameras of the day ....
The image below is a cell-phone snapshot, through glass, of a gorgeous framed "one-off" print from the Medicine Hat Museum and Archives which I bought years ago from a fund-raising auction of various such historical photos (the promise at the time, to encourage high bids, was that each image would never again be reproduced for public sale). The quality of this snapshot does not capture the quality and detail of the original, which depicts a roundup crew in 1898 near Maple Creek, about 60 miles east of Medicine Hat, back when both communities were within the District of Assiniboia. (When the Provinces of Alberta and Saskatchewan were created in 1905 from the four southernmost Districts of the North West Territory, the provincial boundary came between them.)
Interestingly, the identity of each of the men in this photograph is known, and most of the families are still ranching in the same area ...