This was our favorite thing in Iceland besides the volcano. The river is a gorgeous turquoise color. After August, though, the color might change based on weather conditions. The hike is moderately short and easy. The first part goes through private property, but you're allowed to go through. Just be respectful. The whole thing is surrounded by basalt columns, and was just really really cool to see in person. There are 2 different ways to see the canyon: To visit the canyon from the north side of the river, you drive about 18 km on road 923 to the farm Grund. From the parking lot there is about 250 m walk to a viewpoint above the water (we didn't do this way). To visit the canyon from the south side of the river, you drive about 14 km on road 923 to the farm Hákonarstaði and turn left at the sign “Klaustursel”. Drive down to the river and park on a parking lot by the bridge. From the parking lot, there is about a 10 km roundtrip walk. You can make this shorter if you are comfortable off roading the first 2-3 km to the second parking lot. This would be easier if you had a 4x4 vehicle! PHOTO TIP: Visit the SOUTH side of the canyon to get down near the water for the best photos. You can also fly your drone here which makes for epic shots of the columns.

https://www.alltrails.com/trail/iceland/eastern/studlagil-canyon--2?u=i