Grand Teton National Park statistics on recreation visits show that September 2021 was the second busiest on record for the month of September. The park hosted an estimated 570,584 recreation visits in September 2021. This is a 10% increase from September 2019 and a 5.5% decrease from September 2020. https://www.nps.gov/grte/learn/news/grand-teton-sees-second-busiest-september-for-visitation.htm