Going to the Sun Road is one of the most spectacular rides in North America -
One not to be missed if you have the opportunity to do it.
As with anything in cycle touring, there are trade-offs.
Totally empty roads are likely to be unpaved -
Or at least with services only every 50 miles.

Going to the Sun touring was/is one of Bikecentennial's logo images.
http://www.adventurecycling.org/stor...sun-poster.cfm
I have ridden it a dozen times - - and I would ride it again.



Here are the NPS regulations - halfway down for cycling.
http://www.nps.gov/glac/planyourvisit/gttsrfaq.htm

The portion along Lake Macdonald from Apgar to Macdonald Lodge is closed from 11A to 4p.
The eastbound/uphill section from Logan Creek to Logan Pass is closed from 11A to 4P.

I argue that riding Going to the Sun westbound is preferable -
you get the stunning morning light on the Continental Divide as you climb.
And that's the crux - - leave early - - just not too early.
In midsummer, sunrise is between 5:30 and 6:00.
If you leave by 7:00, you will have a cool ride with light traffic.

Even though the road was built 80 years ago - the grade is a steady 8%.
Many places in California. Cincinnati, and County Cork have far steeper climbs.
Again, if you leave around 7:00 from Rising Sun -
you should reach Logan Pass (12 mi) by 9:00, 10:00 max.
Then you have all day to hike the Continental Divide.
The Highline Trail is above timberline most of the time.
So unlike other trails where you climb thru timber for miles -
On the Highline you have stunning vistas from the get-go.



Another reason for spending time up in the sky is to wait before heading down.
Of course, your brakes will be smokin' so you can keep up with the cars.
But its nice to have less traffic whether going up or down.
And since there are hiker/biker campsites at the campgrounds -
there is no worry about getting a place to camp.

I can see no reason NOT to ride Going to the Sun Road.
In fact, there is every reason in the world to ride it.