Visiting in Summer
The summer season runs from approximately mid-April to the beginning of November but July and August are really the summer months in Yellowstone. Park Areas, Entrances and Roads open on different dates. Detailed information is listed on the Opening and Closing Dates for Facilities including scheduled opening and closing dates for areas, campgrounds, entrances, lodging, roads, and more. Also check Park Roads for proposed opening dates and more information.
As the weather warms up, the visitation increases. Most of the hiking trails and all of the visitor services are open. These months are great for hiking and camping, but bring some bug spray. Plan your list by visiting Things to Do in Yellowstone.
If viewing animals is part of why you come to Yellowstone, get out early and late in the day while you are here. Animals can be hard to find on hot days. July and August provide great opportunity to see bison; it is their rutting or mating season. Huge herds gather in both Hayden Valley and Lamar Valley; these areas can be good bear and wolf watching areas as well, if you go early. Don't be surprised if you spend time in bison jams as these beautiful creatures move along the roads.
Did You Know?
Even though the animals of Yellowstone seem tame they are still wild. Feeding the animals is not permitted in any way, and all visitors must keep 100 yards away from wolves and bears, and 25 yards from other animals.