Lepraria borealis is a species of leprose lichen in the family Stereocaulaceae,[1] found in cool climates across Northern Europe, northwestern North America, Greenland, and Antarctica.

The species forms a granular crust with abundant soredia and shows considerable chemical variation, typically containing atranorin and rangiformic acid.

It was found at Namskroken, on the northern bank of the Namsen River, east of Mattisflya, at an elevation of 340 m (1,120 ft).

The reproductive structures consist of abundant coarse granules (soredia), typically measuring 100–200 μm in diameter, which often have short projecting threads (hyphae).

The species has been recorded from Northern Europe, northwestern North America (including British Columbia and Washington), Antarctica, and Greenland.