FILE - Mt. McKinley is seen on a rare sunny day.
FILE - Denali, formerly known as Mount McKinley, is seen on a rare clear day in Denali National Park and Preserve, Alaska.

DENALI NATIONAL PARK, Alaska  - Road crews have cleared one lane in Alaska’s Denali National Park and Preserve, and buses are beginning to return about 300 stranded tourists back to the park entrance.

The tourists became stranded Friday after heavy rains triggered mudslides and caused excess water from a culvert to damage a road.

In this Aug. 26, 2016, photo, a shuttle bus carrying tourists makes its way along the park road with North America's tallest peak, Denali, in the background, in Denali National Park and Preserve, Alaska. President Barack Obama's administration in…
A shuttle bus carrying tourists makes its way along the park road with North America's tallest peak, Denali, in the background, in Denali National Park and Preserve, Alaska, Aug. 26, 2016.

Park spokesman Paul Ollig told The Associated Press that all the stranded passengers are expected back at the park entrance Friday night, but he didn’t have an exact time of when they would arrive.

“Our team did an outstanding job responding to multiple debris slides along a pretty remote section of road,’’ said Erika Jostad, Denali’s chief ranger. “The geohazard team monitored conditions while the road crew was clearing debris. It was a great example of teamwork.’’

Earlier Friday, Denali’s superintendent closed Denali Park Road to all traffic at mile 30. The road is the only one inside the vast park.

Similar debris flows led to daylong traffic restrictions last week. Continued heavy rains since kept the road and surrounding tundra saturated with water.

Also Friday, the Alaska Railroad said it has halted service north of the park because of the failure of a retaining wall caused by high water in the Nenana River.

Passenger and freight service will be suspended through the area until late Monday at the earliest, the railroad said in a statement.

The railroad added that passengers traveling north to or south from Denali Park on the Alaska Railroad or on an Alaska Railroad provided service through Holland America/Princess or Premier Alaska Tours should expect delays.