treaty 7 is an agreement between canadian crown and several, mainly blackfoot, first nation band governments in what is today the southern portion of alberta. the idea of developing treaties for blackfoot lands was brought to a blackfoot chief named crowfoot by john mcdougall in 1875. it was concluded on september 22, 1877. the agreement was signed at the blackfoot crossing of the bow river, at the present-day siksika nation reserve, approximately east of calgary, alberta. chief crowfoot was one of the signatories to treaty 7. another signing on this treaty occurred on december 4, 1877 to accommodate some blackfoot leaders who were not present at the primary september 1877 signing.