I42
Nobody else seems to be up for this challenge, so may I ask for some more clarification?
North America seems pretty certain.....?
Western side of the continent and therefore the Rocky Mountains.....?
If the Rockies, it looks more like the Eastern side of them because they get close to the Ocean on the west and there can't be many rivers like that.
You pointed me towards the other base for AirSpray, so does that make it Canada?