JACKSON (WNE) — Crews in Yellowstone National Park are working to clear nearly a foot of snow from the park to allow visitors early season access.

“Due to extremely heavy snow received this week,” officials wrote on social media, “the park’s efforts to open interior roads by April 15 have been delayed.”

Thanks to progress made clearing large snow drifts, the West Entrance to Old Faithful stretch and Mammoth Hot Springs to Norris were able to open midday Friday.

The road between the North Entrance, Mammoth Hot Springs and Northeast Entrance is open year-round.

There was still no word on when the Norris to Canyon Village stretch would open. It was scheduled for April 15. Crews were actively working on that route late Friday.

East Entrance to Lake Village and Canyon Village to Lake Village stretches are scheduled to open May 6, followed by the Cooke City to Chief Joseph Scenic Byway stretch May 11.

The South Entrance opens May 13, with access to to West Thumb, Lake Village and Old Faithful (Craig Pass).