Sichuan–Tibet Highway — Markam to Zuogong via Dongda La High Pass and Lancang River Canyon
Sea-level canyon to 5,000m pass in one gut-punch climb.
Out of Markam, Tibet, the G318 drops into the Lancang River canyon before the road begins a relentless switchback assault up to Dongda La — 5,008 metres above sea level — where prayer flags shred in wind and your engine loses a third of its power. This segment of the Sichuan-Tibet Southern Route is genuinely dangerous: the road surface alternates between crumbling tarmac and raw dirt cut into landslide-prone slopes, with sheer drops and no barriers. Trucks hauling goods to Lhasa crawl up the same single-lane shelf road you’re navigating, requiring nerve and patience at passing points carved into the mountainside. Zuogong town sits below in a river valley and serves as the only reliable fuel and rest point in a 300-kilometre stretch.
Rated Difficult to Expert depending on season and recent road damage. Landslides close sections without warning; the July-August monsoon window is the highest-risk period. A diesel-powered vehicle with good power-to-weight ratio handles the altitude better than petrol. Altitude sickness is a real risk — do not rush this segment. Foreigners require a Tibet Travel Permit and an Alien Travel Permit for this specific stretch; join an authorised tour group or hire a local guide with the correct paperwork. Cell service is non-existent for long stretches. Carry extra fuel, food, and warm gear regardless of season.
Trail Specs
| Difficulty | Expert |
|---|---|
| Trail Type | High Clearance, Overland Route |
| Surface | Dirt, Gravel, Mixed |
| Features | High Altitude, Historic, Remote, Scenic |
| Length (miles) | 105 mi / 169 km |
| Duration | 2-3 days |
| Max elevation (ft) | 16430 ft |
| Best season | September-October |
| Minimum vehicle | High-clearance 4WD diesel |
| Nearest town | Markam, Tibet Autonomous Region, China |
| Land manager | Tibet Autonomous Region Highway Bureau / Ministry of Transport China |
| Permit required | Yes |
| Cell service | None |
| Water crossings | No |
| Dispersed camping | Yes |
| Official sources | Tibet Travel Permit info |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
What's the minimum rig to drive Markam to Zuogong via Dongda La?
High-clearance 4WD diesel, full stop. The altitude kills underpowered gas engines, and the gravel switchbacks above 4,500m will beach anything with less than 8 inches of clearance. A loaded overlander with a rooftop tent will feel the thin air — tune your engine accordingly before you leave Markam.
When is Dongda La Pass actually driveable?
September through October is the reliable window — snow can close the pass as early as November and it can stay buried until May or June. Summer monsoon (July–August) brings landslides in the Lancang Canyon section that can shut the road for days without warning.
What permits do you need to drive this stretch of G318 through Tibet?
You need a Tibet Travel Permit (TTP) at minimum, and depending on your nationality and route, you may also need an Alien's Travel Permit (ATP) and a Military Area Entry Permit. Foreign nationals cannot self-drive Tibet legally — you're required to use a licensed Tibetan travel agency with an assigned guide and registered vehicle.
What's the hardest section between Markam and Zuogong, and what makes it brutal?
The 60km climb from the Lancang River floor to Dongda La summit is the gut punch — you gain roughly 3,500 meters of elevation with no meaningful plateau to recover. Above 4,800m the road degrades to loose gravel with exposure on the outer edge, frequent rockfall debris, and zero guardrails. Altitude sickness hits drivers and passengers hard on this section; acclimatize in Markam for at least one night before attempting it.
Is there any fuel or resupply between Markam and Zuogong?
There is no guaranteed fuel stop on the 169km route — carry enough diesel to complete the segment plus a reserve, as the consumption spike at high altitude is real. Zuogong town has a petrol station but stock up fully in Markam before you leave.
Trail track
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