From Florida to Utah, national parks that have been closed due to the coronavirus pandemic have begun detailing how they will reopen their grounds to the public.

Firefly events at Congaree National Park in South Carolina and Great Smoky Mountains National Park in Tennessee and North Carolina have been canceled for this summer due to the coronavirus pandemic.

Grand Teton and Yellowstone national parks announced Tuesday afternoon that they would be closed to all visitors. The announcement came hours after Great Smoky Mountains National Park officials, unable to discourage visitors from coming into the park, announced that they would close most of the park to the public in a bid to slow the spread of coronavirus. That was followed by news that the southern end of the Blue Ridge Parkway would close, and Mount Rainier National Park officials said they were closing all roads into their park.

It's not just cars that are clogging the loop road to Cades Cove in Great Smoky Mountains National Park. Bicyclists and pedestrians flood the 11-mile, one-way route during vehicle-free periods, currently Wednesday and Saturday mornings until 10 a.m. from May through September. Due to growing use and congestion, the park is proposing to implement a pilot study for 2020 to evaluate changing this vehicle-free period to a weekly, full-day closure on Wednesdays from May through September.