Montana's three entrances to Yellowstone National Park will reopen to visitors Monday, as the state moves to its second phase of restarting the economy after shutdowns because of the coronavirus.

Parts of Glacier National Park could open in mid-June, Governor Steve Bullock added Thursday, but a specific day has not been set.

The West Yellowstone, Gardiner and Cooke City entrances to Yellowstone will open two weeks after Wyoming's entrances near Cody and Jackson. The park, famous for its geysers and bison, remains open for day use only. No overnight accommodations are available, and large tour buses aren't allowed yet, park Superintendent Cam Sholly said.

Park employees won't be policing visitors' compliance with U.S. Centers for Disease Control and Prevention guidelines such as social distancing and wearing masks, Sholly said Thursday.

The opening of Yellowstone remains a gradual one. Limited overnight facilities, such as cabins and campgrounds, will begin reopening later in June, Sholly said.

The Montana gates will reopen at 10 a.m. Monday.

Montana's second phase of reopening Monday includes allowing bars and restaurants to operate at 75 percent of capacity and letting groups of up to 50 gather as long as they can meet social distancing guidelines. Montana is also lifting its 14-day quarantine for out-of-state visitors.

With the increase in visitors, Montana is going to increase COVID-19 testing in destination and gateway areas and of park employees and other workers in tourist areas. Additional contact tracing will be available, too.

The eastern entrances to Glacier National Park, which lead to the Blackfeet Indian Reservation, are expected to remain closed until the Blackfeet Tribal Council lifts its prohibition on nonessential travel, according to the Montana state official.