The Bortne Tunnel (Norwegian: Bortnetunnelen) is a road tunnel in Bremanger Municipality in Vestland county, Norway.

The 4,758-metre (15,610 ft) long tunnel was built from 2010 to 2013 and was opened in the summer of 2013.

[1] The tunnel is part of Norwegian County Road 616 and it connects the village of Bortnen to an area along lake Sørdalsvatnet, about 8 kilometres (5.0 mi) north of the municipal center of Svelgen.

The tunnel was built as part of a large project to connect the islands of Bremangerlandet and Frøya to the mainland with a direct connection to the municipal center of Svelgen.

[2] After this tunnel opened, the ferry connection from Smørhamn to Kjelkenes (across the Frøysjøen strait) was discontinued.