Gnarnia Grålum, Sarpsborg, Viken, Norway 1.1km|6m ◢ ◣ 78m|07.05.2020 Open in the Trailguide Web App Description Starts with a nice path and tractor road, transitions to a nice floating path, then down a magical valley with many track choices. Ends with a scary pile of stones/river. Keep the left path after the pile down onto the gravel. Just stay away if wet.