Our trip to Glacier national park cut short because the trail we planed to hike was closed due to the bear activity. As half of the park was already closed due to COVID19, there were not many things we could do. We spontaneously decided to go to Yellowstone to see the sunset and moonrise over the geysers. We arrived Yellowstone at 6PM and left there by noon next day. We stayed less than 24 hours but could see lots of amazing things. The main reason we stayed Yellowstone so short time was the crowds. After 10:30AM, it started to get very crowded.