when is the best time to go to yellowstone national park

What enblethen said... its a gorgeous park during the hot months of summer, I can't imagine how beautiful it is in spring bloom, fall with colors changing or winter washed in snow.

I hope to get back there someday soon!

Best time to go is anytime during the year.
Spring is good for seeing the newborns and lots of flowers.
Summer you will see more people and crowds along with the great views.
Fall you will see the elk getting together wonderful colors.
Winter the steeping icy geysers bison covered with snow plowing their way through the vallies and roads.
Overall, I would suggest late spring May-early June or Early Sept-Early Oct. for best of all.

After Labor Day.
Kids are back to school and the crowds drop dramatically.
Temps are much cooler.

Only been once a number of years ago. Second week after Labor Day. Crowds were small. Weather was great, albeit a little cold in the early morning.

We did the last week of Sept, the only issue we ran into was closed roads for maintenance.

We've always gone in September. We've been there early, mid, and late and all are good times. Early it can be warmer than later, but the crowds are down and the weather is good. Plus the elk are rutting and gathering which is always good to see.