Yes, turn onto IR 464 in Browning and continue north to Many Glacier.
IR 464 turns off US 89 in Browning just after US 89 turns west.
US 89 has been improved little by little over the past 20 years.
Traffic between Fairfield and Dupuyer is light to moderate.
Traffic on the Rez south of Browning picks up a little but there are shoulders.
North of Browning, summer traffic can be heavy,
plus the road is narrow, curvy, with lots of steep sections.
There is a massive project going on just south of St. Mary.
Because of the traffic volume and terrain it is a mess.
Flagger trucks should shuttle you - but no guarantees.
Some companies won't because of insurance issues.
I am not aware of any ongoing construction south of Dupuyer.
When there has been construction, it has been more manageable.
Newer sections of US 89 south of Dupuyer have shoulders.
Older sections do not. But traffic is not that bad.
I don't know why auto traffic continues to be relative light.
I suspect cars stay on I-15 and cut over on US 2 - like the NT route.
I've ridden it many times without any problems.
Sometimes there can be a headwind - more often a sidewind.
(You are likely to have wind across ND & MT - ride early.)
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Also, west of the Missouri River towns are few and far between. And small.
Even before the pandemic, stores were disappearing from remote towns.
Check carefully - it's likely that some may never reopen.
If a tiny town's bar/cafe/store is gone, don't hesitate to ask someone for water.
Quite often, you'll end up with cookies and an apple, too.
Pic - Empty highway in eastern Montana
