fj12ryder wrote:
We were at Fishing Bridge a few years ago and it closed the last week in September. We had no issues with bad weather. I think you'll be fine.
The last time I was in the Yellowstone area in a campground in Sept. ,they had us shut our water off because of the below freezing temperatures at night . . Just the other day of course its winter is was 42 below in West Yellowstone . And it "can" get nasty in September . We usually get snow or hail in June for annual summer trip to that area ,we are about 30 miles from West Yellowstone .