The road through Lassen Volcanic National Park finally reopened July 27, 2017. It was the latest opening in park records dating back to 1931.

REDDING, Calif. — The north-south road through Lassen Volcanic National Park finally opened Thursday after nearly four months of snow-clearing work.

The opening of California 89, called Lassen National Park Highway for the 30 miles it traverses through the park, set a record, park officials said.

“This year’s opening of the highway will be the latest in park records dating back to 1931,” Lassen Superintendent Jim Richardson said.

Since 1980, the latest opening was July 21, 1995, according to park logs.

For the most part, the snowy winter’s still-persisting snowpack caused the delay, especially a section between Lassen Peak parking area, about 130 miles north of Sacramento and 50 miles east of Redding in the Sierra Nevada, and Summit Lake.

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Visitors still can find roadside snowdrifts for snowball fights.

“There’s 10 feet of snow still on the perimeter of the parking area,” Lassen spokeswoman Karen Haner said.

The road-clearing work began April 4 with help from the California Department of Transportation.

Snowfall in the park was about average for winter, but it was more than during the drought the previous four years, Haner said earlier this month. A total of 28 feet of snow was reported over the winter at the summit of the park highway.

Along the way, crews dealt with fallen trees, rock slides…