Suggestions for Routing Calgary, AB to St. Mary, MT

If you must go to Calgary ( there are alt.routes) go west to Cochrane and turn south on #22 south to #3. Then east about 2 miles to Pincher Creek south there past Waterton N.P (Canadian) and south to St. Mary (Glacier NP (US).

If you do not need Calgary - take #40 south at Grande Prairie. St the trans canadaeither go west to continue south on #40 - thru Kananaskis Country and then out to #22 at Longview, then south to Pincher Creek (as above). More info wnated you can PM me.
John