Sléttuhlíð is a district on the east side of Skagafjörður, close to Höfðahólar and out towards the Stafá river.

Sléttuhlíð is a long hill, 173 meters tall, between two oblong lakes called Kappastaðavatn and the Sléttuhlíðarvatn.

Between the hill and the mountains there is a low-lying dell, relatively lush, with several farms including the church site Fell.

[2] To the west of Fell is the abandoned farm Fjall where Sölvi Helgason (also known as Sólon Íslandus) was born.

A little to the south is Hrolleifsdalur, which is said to be named after the explorer Hrolleifur, and is now completely deserted.