Very large KOA. Had a tent site next to the creek/pond. Very quiet at night. Check in was a breeze. Camp store appeared to be well stocked. Bathrooms were spotless, large and well appointed. Showers are not on a timer. Note there are 2 KOAs in West Yellowstone. They're only a couple of minutes apart but your navigation may lead you to the wrong one. "Mountainside" is the one you're looking for.

This campground is about 10-15 minutes from the west entrance of the national park. Once you enter the park you still have a ways to travel before you reach the junction for the ring road. So it's better to stay at a campsite in the park if you want to maximize your time for sightseeing. The KOA could be used as a home base for visiting the national park but it will entail a lot of driving. This campground is best as an overnight before entering the park, or as a base to explore the town of West Yellowstone and it's attractions, or to partake of the countless activities in the Targhee National forest.