The remote highways running along the north of Kham can be used to exit the Tibet Autonomous Region into Qīnghǎi, Sìchuān, or as part of a long loop around Kham. At the time of writing only one route into Qīnghǎi was open to foreign travellers: Hwy 109 (also known as the Qīnghǎi–Tibet Hwy) running from Lhasa to Xīníng. As the railway covers the same route most people do not hire private vehicles for this section. A few hardy souls make the trip by bike, crossing into Tibet over the 5180m Tangu-la pass. Under current regulations, a guide still needs to accompany you and your bicycle in a support vehicle. Check out Bike China for more.