We completed the trip on Monday. We had good weather not hot from starting point Truckee, CA to Baker, NV 413 miles. Day two toVernal, UT was also very good temps. 330 miles. Day three to Thermopolis, WY also very good weather 310 miles. Day four to Bozeman, MT was cold 37F and heavy fog and drizzle on hwy 120 but cleared up before we got to Cody. Due to heavy dark clouds in the direction of Chief Joseph Highway we took US20 into Yellowstone and the weather was perfect. From there up to Bozeman was great. 352 miles. Day five Bozeman to Ketchum, ID was cool in the early morning 40F but warmed up quickly and great riding conditions to Ketchum. 438 miles. Day 6 to Burns, OR ideal weather and wide open roads. 320 miles. Day six to Jacksonville, OR was clear skies and in the 70's. 300 miles. Day 7 to San Ramon, CA clear skies and damn hot from Redding to San Ramon 94F. 362 miles.
Only regret was not being able to do the Bear Tooth due to snow and freezing temps. I have done it three times in the past but my riding buddy has never made the run. I have confirmed in my mind, the PNW is best riding conditions in late August and first week on September. That is what I have experienced.