Svartediket is a lake in the city of Bergen in Hordaland county, Norway. The 0.5-square-kilometre (0.19 sq mi) lake lies immediately north of the mountain Ulriken, northeast of the Store Lungegårdsvannet bay. Historically, this lake was called Ålrekstadsvannet, but in the late 1800s, a dam was built on the south end of the lake to create a reservoir for the city's drinking water.