Bee Vee -
Here's a modified Great Parks North.
https://ridewithgps.com/routes/26537829It starts in Great Falls, not Missoula.
Hwy 83 north of Missoula has limited views, minimal shoulder, and moderate+ traffic.
US 89 north of Great Falls has great views from Fairfield north, half the traffic, and better shoulders.
The route has a half dozen out-and-backs over the continental divide.
1. Going to the Sun Road - twice as nice - from Sunrise Campground - can leave all your stuff in bear boxes, too.
2. Many Glacier - the finest hiking in Glacier NP - hiker/biker camping - pizza at the cafe or fine dining at the lodge.
3. Waterton NP - The town campsite is a zoo, can hike in 1.5 miles to a great backcountry site.
4. Kananaskis Park - Just fantabulous - great lakeside campsites, plus park store nearby.
(I routed you on Spray Lakes Road to Canmore - but you can follow paved Kananaskis Hwy to the TransCanada.)
(North of Banff - crazy tourists - make sure to ride Hwy 1A, the old road.)
5. From Castle Jct - you can head over to Kootenay NP - Marble Canyon is stunning with the powerful Kootenay River.
6. Lake Louise - definitely worth taking the 15-miles day trip out to Moraine Lake. (Lake Louise is a zoo.)
7. Yoho NP is really sweet - very nice camping, spectacular scenery at Takakkaw Falls.
(Make sure to ride the Old TransCanada Hwy in at least one direction - biker/hiker only.)
(Back to the east side - start up the Icefields Parkway.)
8. At Athabasca Falls take the old road and do the spur road to Mt. Edith Cavell.
* If you have extra time, the rode to Mount Robson in BC is nice - plus you can ride into a backcountry campsite.
If you were to skip any of the out-and-backs, I would choose to skip Kootenay NP.
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In case you do not know, there are primitive hostels all along the Icefields Parkway.
Not much more than camping - bunks, no running water, outhouses, but you meet cool folks.
I've stayed in many of them. Castle Mountain is modern - as are Banff and Jasper.
http://hihostels.ca/en/destinations/albertaHere is a map of Icefields Parkway that may not be available any longer -
https://swimnova.com/map-columbia-icefields-parkway.html#There are also general backcountry maps (not for hiking) of each Canadian park.
They also show which trails/fire roads are bikeable.
Banff -
https://www.pc.gc.ca/en/pn-np/bc/yoho/activ/arrierepays-backcountryKootenay -
https://www.pc.gc.ca/en/pn-np/bc/kootenay/activ/arrierepays-backcountry/carte-mapYoho -
https://www.pc.gc.ca/en/pn-np/bc/yoho/activ/arrierepays-backcountryJasper -
https://www.pc.gc.ca/en/pn-np/ab/jasper/activ/passez-stay/arrierepays-backcountry/cartes-maps<<<>>>
Hope this helps.
Again, US 92 in Montana, Hwys 93 & 95 in BC are not that great.
The east side is far more rewarding.