Missoula to Bozeman via 200 to 141 to 12 to 287 to I-90
Have you ever gone Southwest from Missoula on US-12 / aka Lolo Pass? A consideration...
Some Lolo Pass photos are in this page:www.jimwilliamson.net/motorcycle/2004-09-mt-id-wy/05-tue/
Not much for fuel between White Sulphur Springs & I-90 on US-89Bozeman to Cody via 89 to Yellowstone Grandloop to 14
Going through Yellowstone can be slow going, marching along in a line of cars and RV's such that you can't pass and, at times, can't enjoy the twisties that are there.
Consider taking I-90 to Columbus and then dropping south on Route 78 to Red Lodge. Red Lodge south to scenic Beartooth Pass (if open - should be???) on US-212, then to Cody via Route 296 / Chief Joseph Highway (fun), dropping into Cody via WY-120.
A view of Route 78 out of Red Lodge:http://www.jimwilliamson.net/motorcycle/2004-09-mt-id-wy/03-sun/img_0112.jpg
This trip report has Cody > Cheif Joseph Hwy > Beartooth > I-90 > White Sulphur Springs (eventually to Glacier) and should give an idea of what scenery you'll get:www.jimwilliamson.net/motorcycle/2004-09-mt-id-wy/03-sunCody to Sheridan via rt 14
I took 14a via Lovell - found it enjoyable in the Bighorn N.F. area.
For 14, east of Shell is nice (again, Bighorn N.F. stuff)
I don't recall which was "better" tho. 14A (on the western edge of B.N.F.) was something of a coming down the "edge" of a cliff type of route. 14A east of Shell was more of a "canyon ride" transitioning from the low area to the high area.Lusk to Dubuque via rt 20
US-20 - did that in an MG some years back - Rockford IL to Casper WY (and LA)
Two-lane (flat, straight) through the wide open spaces. You and the cows and the trains with a city tossed in here and there. Fairly relaxing. I did it once, enjoyed it, might do it again.
Photos:www.jimwilliamson.net/automobile/1995-07-01-drive-toms-mgb-to-ca/page1.htmDubuque to Chicago
Like has been posted - StageCoach Trail. From US-20 head up main street in Galena. If you have a hard time "finding" the Stage Coach Trail road sign - just stay on the west/north side of the river as close to the river as you can. It's THE road that heads out of town on the N / W side of the river. IIRC there is a rectangular, green sign at the far north end of downtown pointing a right hand turn for Stage Coach Trail.
SCT is more interesting / twisty at it's western end (Galena to Scales Mound). I have a map posted that describes SCT a bit:www.jimwilliamson.net/motorcycle/2002-04-11-first-warm-day/
If you're trying to avoid US-20 in IL look at the east/west road through Cedarville IL - decent alternative (straight line N of Freeport on the above map).
Not sure if you're interested in Jackson Hole WY to Sheridan WY (should you do Lolo Pass and be heading towards Yellowstone / Tetons). The section out of Yellowstone is what gave me the "line of cars and RV's" memory.www.jimwilliamson.net/motorcycle/2004-09-mt-id-wy/07-thu/