Lake Urdarhaedarvatn lies just a stone's throw away from The lake
Ulfsvatn towards
northwest. It has an area of 2,3 kmē. It is shallow and located at 447 m above sea level.Its discharge feeds Lake Kvislarvatn nyrdra.
The lake char and brown trout of the lake are large enough and well
tasting. A 4wd track lies all the way to the lake.
The distance from the capital over the mountain pass Kaldidalur is about
200 km.