Highway 101 in northern Mendocino County will be closed until at least Friday as crews work to remove more than 6,000 cubic yards of rocks and soil that tumbled onto the road late Sunday, according to Caltrans.

The two-lane section of highway, about 6 miles north of Leggett, was undergoing repairs and already limited to one lane of traffic before the slide occurred. The road also was closed entirely March 10 following a previous landslide.

The area is prone to rock slides but had been relatively stable for a number of years, Caltrans spokesman Phil Frisbie said. The current slides likely are the result of heavy rains and extreme temperature changes between storms, he said.

The current cleanup has been hampered by unstable soils that continue to slide, Frisbie said.

Caltrans advises people heading north to Humboldt County and beyond to use Highway 5 until the road is cleared.