Goldseeweg is good, yes. but the trail from Glurnser Alm is the icing on the cake!
i’ve ridden lots in Süd Tirol. when i guide (only one tour this year) my tours take me through the whole of the region from north to south. fantastic region, especially around Fanes Alm/Marmolada and some of the trails around Bozen.
but, IMO, Vinschgau is a little bit more special. many of the trail-heads are accessable via relatively easy, not too steep clmibs, the trails are really varied from GF-friendly (the Waalwegs, for example) to don’t-tell-mum type riding with everything inbetween. but, most importantly it has its own mini micro-climate and is one of the sunniest spots in the northern Alps and recieves very little rainfall. the day after it rained the trails were bone dry as the ground soaks it up. even in he depths of winter it rarely snows below 1000m in the valley.
yes there is a small network of well sign-posted trails, each graded according to the Single-Trail Skala (http://www.singletrail-skala.de/). but the rest of the trails are also well sign posted and are open to bikes unless stated otherwise via an obvious “no bike” sign.
i’m already planning next years trip 🙂