The Gamri Chhu is a tributary to the Drangme Chhu that begins at the Indian border and flows into the Drangme Chhu just upstream of Trashigang. There is a lot of opportunity to paddle a variety of sections on this river.
Mile 0: Put-in near the town of Rangjung where the river looks fun to you. There is a small village just downstream of the town of Ramjung ("Lower Rangjung") with good river access. There are some Class IV/V rapids just upstream near the town.
Mile 0.1: There's a Class IV warm up rapid followed by some fun continuous whitewater.
Mile 2: There is a tricky Class IV rapid just before take-out that can be scouted from the left.
Mile 2.1: Take out on the left just after the last rapid by hiking up the Thundgri Ri, a tributary creek. It's a tricky scramble up to the road from here. You can also continue exploring downstream to where the road comes close to the river again about a mile down.