The Dettifoss waterfall is the most powerful waterfall in Europe, 200 cubic meters of water per second plunge over the edge. Dettifoss is 45 m high and 100m wide. A nice hiking trail, 34km, goes along the canyon from Dettifoss to Asbyrgi. Camping is possible in Vesturdalur.
Road 864 goes from road 85 past Dettifoss on the east side towards road 1. This is a gravel road and driving speed depends on road conditions each time. Road 864 is closed during wintertime due to snow or wet conditions (muddy road) and does not open until early summer (end of May).
Road 862 is on the west side of the waterfall. This road is paved but is not in winter service from January until the beginning of April.
Dettifoss Waterfall is part of the Diamond Circle.