Above Trin is Alp Mora. And east of Alp Mora are the Gletschermühlen (glacial mills) or Strudeltöpfe. I took the bus to Trin Quadris. But you could also take the bus to Trin Dorf. The hiking path just above Trin is more comfortable then the main road starting in Quadris going east.
It's a 1100 m climb up to Alp Mora, and then another 200 m to the glacial mills.
Or you could drive up to Tegia Sut, but you need a day permit to drive up the road. An other way would be a bike, or a e-bike. And then the starting point would be Quadris.