Fjärås Bräcka, Nature reserve in Kungsbacka Municipality, Sweden.

Fjärås Bräcka is a 4 km long and about 500 m wide end moraine, part of the Göteborg moraine, crossing the Lygnern valley and damming the lake at 15 m above sea level. Its highest point is 76.4 m above sea level, with heath on the west side and dry meadows and deciduous woods on the east.

The ridge was formed on the seabed about 14,500 years ago at the edge of the retreating ice sheet. Li burial ground on the western slope holds 127 remaining raised stones from the Viking Age, and the area may have been settled since the Bronze Age. The ridge became a nature reserve in 1976.

The ridge's crest carries Gamla Förlandavägen, a route used from the Stone Age to the Middle Ages as part of the Kungsleden between Copenhagen and Kristiania. On the western slope lies Li gravfält, with 127 standing stones from the Viking Age. Naturum, opened in 2005, has exhibits on the reserve's nature and history and a café.

A 1.5 km nature trail runs from the Naturum along the ridge crest toward Fjärås church and back below the ridge on the east side. A staircase of 142 steps links the old gravel pit to the crest. The Naturum, opened in 2005, has an exhibition and a café.

A staircase of 142 steps between the old gravel pit and the ridge top reconstructs a stair used between 1917 and 1921, when passengers walked between a steamboat jetty on Lygnern and a primitive railway stop on the coastal side. State Railways ran a gravel pit here from 1910 until 1967, with a rail spur to the main line; over a million tonnes of gravel were removed.