No flow trail and not S1/S2... The trail is only S1 in sections, mainly in the upper part. Then over large parts S3 in the middle part, steep with many hairpin bends on loose coarse gravel. Safe bike control and advanced riding technique are required on an exposed scree field (e.g. keeping your balance while stationary and/or moving the rear wheel). Further down, the trail becomes less demanding (mostly S2), but with some narrow, blocked (S3) passages and steeper again in the lowest part switchbacks. All in all a beautiful trail in a great landscape for experienced nature trail bikers.