The narrow, frozen lake is also great for hiking, ice fishing or even skiing if there's a little snow. A handful of sites in the Sandstone Ridge Campground are open for winter camping.

For example, if you go to the U.S. Forest Service reservation website and try to book a spot at the Mirror Lake campground in the Uintas, the earliest you can get in is July 14th.

Near Lake Delton, Mirror Lake State Park attracted slightly more than 315,000 visitors in 2019, a 3% increase from the 305,000 visitors in 2018, said park Superintendent Ryder Will. He attributed ...