CN doesn't like to run molten Sulphur unit trains, preferring to stick a cut of 30-40 tankers on a manifest such as 346. Then again I have seen it once last year. The train was almost always parked @ CN's Fort Route yard (Winnipeg) when I railfanned there in 2003-05.
This however is either your daily manifest (454), which includes boxcars, gondolas, flats etc., not to mention IMS on the back, or 344, a grainer with a cut of tankers up front. CP does not run Molten Sulphur unit trains through Saskatoon, but this photo sure looks otherwise.
PS. I could of cropped the foreground, but decided to leave it in to show the extent of our grassfires. Really no fun standing on that stuff... CP's ROW got scorthed bad!
1:10pm dep. Sutherland, CP 454? 16 tankers/60 hoppers
CP 9541-5987 (d/f-action red)