Are talking about using an Adventure Cycling route? If so, which one? We have two that will cover the distance between those destinations.
Great Parks North, (http://www.adventurecycling.org/routes/greatparks.cfm), a road route
Great Divide Canada, (http://www.adventurecycling.org/routes/greatdivide.cfm), a mostly off road route
From the Routes & Mapping FAQ (http://www.adventurecycling.org/routes/faq.cfm):
How many days does it take to ride X number of miles?
Each individual and group will need to first determine how many miles a day they plan on riding (our road group tours average 60 miles per day.) When you have figured this out, take the total miles for the ride and divide it by the miles per day; this will give you the number of days it will take to complete your ride. Remember to add in a few layover or rest days, and keep in mind that some days you may exceed your expectations and some days you may not. (Total miles to be ridden/miles per day + layover days = # of days it will take to ride.)
Riding off road you generally cover fewer miles. It takes more energy to negotiate uneven terrain and navigation can be trickier than on road. You'll find some guidelines for average miles per day in our Bike Touring 101 article: http://www.adventurecycling.org/features/biketouring101.cfm
I hope this helps.