Take the bus from Skjeggedal-Mågelitopp. Save about 1,5 hours hike one way! Start hiking from the upper starting point. It is still a long, and for many a demanding hike into the Trolltunga itself. The bus will not take you all the way to the actual Trolltunga site - just up the 4,3 km (14 104 feet) and first 400-meters (1,312 feet) of the ascent, at the top of the route, it’s still a 3-4-hour hike to Trolltunga in each direction. Total 6-8 hours hike. But any little bit helps!