Abert Rim, Volcanic cliff in Lake County, Oregon

Abert Rim is a fault scarp in Lake County, Oregon, rising 2,490 feet (760 m) above the valley floor and ending in an 820-foot (250 m) sheer basalt cap. It runs more than 30 miles (48 km) from Lakeview north to Alkali Lake, with a pale, vertically striated rock face and a blocky slope below the rim.

Abert Rim formed during the Miocene epoch, when basaltic flood lavas covered much of eastern Oregon. Later faulting tilted great blocks of crust; the rim stands at the western end of one block, while Lake Abert lies on another. John C. Frémont mapped the escarpment and lake on December 20, 1843, naming them after his commanding officer, Colonel John James Abert.

The Northern Paiute name for the scarp is paʔa tɨkwɨnɨdɨ, meaning "high rim rock." The southern section hosts paragliding and hang gliding, with national free flight festivals held each year in late June and during the Fourth of July.

The rim is reached from Highway 395, where a geologic point-of-interest sign marks the viewpoint; the southern section is the launch area for paragliding and hang gliding. Free-flight festivals take place in late June and around the Fourth of July. The cliff face and slope offer no shade or water, so carry your own.

The Northern Paiute name for the scarp, paʔa tɨkwɨnɨdɨ, means "high rim rock". Bighorn sheep were transplanted here from nearby Hart Mountain in 1975 and 1977 and are often spotted from the Abert Rim geological point of interest sign on Highway 395.