Originally Posted by Wildwood Danny
What are the road conditions going into West Yellowstone around the middle of September? Could there be ice or snow? Are there many steep grades?
You probably wonít encounter any snow but it is always a possibility at higher elevations. This can be said for June, July, and August too.
Heading to West Yellowstone you will encounter some steep grades but your diesel should have no problems. If you enter Yellowstone via the east entrance youíll encounter the Sylvan Pass with grades of 5% to 7% for about 5 continuous miles. If you come in via the south entrance you will encounter the Craig Pass and cross the continental divide twice with grades of 5% to 6% but those steep grades are much shorter in length. We always enter via the south because we stop in the Tetons for a couple of days before moving on to West Yellowstone. Donít sweat the steep grades, youíll have no problem. Enjoy your time in Yellowstone.