Trail is mostly intermediate but there is quite a lot of technical sections. Downhill from Eilevstølen is really nice with some technical parts. In all of the trail there is some wet spots so if there has been heavy rain, this trail might not be the best option to take.. The trail goes trough a swamp just before Ruperanden. So you probably get your legs wet. But if you don´t be afraid of wet feet, definitely worth while biking for.
Find the whole loop here: https://trailguide.net/1771
First it follow road 40 and takes a turn to the ski track. Then follow Treerwegen up. Trail starts roughly after 7,5 km and it goes alongside of the road for the first couple of kilometers.