There are many Trekking tours from Quan Ba pass to villages. Travel guide to remote Ha Giang province including Dong Van and Meo Vac with tourist information, suggestions, reviews and ideas. There is possibility to explore the province by local buses or by renting car with a driver. However, most tourist is probably doing the discovery of Ha Giang province by motorbike. There are a number of motorbike rental agencies in Ha Giang Town. As the province is getting more and more people discovering the province it can be good to book in advance, particular in October and November when the province also see the peak of local tourists.
Most travelers go on a loop of most northern Ha Giang (Tam Son, Yen Minh, Dong Van, Meo Vac, Lung Cu …). Note that the roads are tarmacked almost throughout, but they are narrow, winding, going steep both up and down and with potholes here and there and hence quite demanding to drive. For a motorbike tour try to allocate at least 3 days.
Many areas is also good for trekking.