Yellowstone In July 2025. Yellowstone caldera chronicles is a weekly column. Grand loop road remains open to vehicles, and other nearby thermal basins, like black sand basin, are open.

“it was a necessary decision to say, ‘hey, ok, i don’t want to really talk about this anymore. At around 10:00 am mst on july 23, 2025, a small hydrothermal explosion occurred in yellowstone national park in the biscuit basin thermal area, about 2.1 miles (3.5.