Shikoku Karst Forest Road – Tengu-Kogen to Tsuro Skyline
Karst ridgeline cattle country above the Pacific.
The Shikoku Karst (Shikoku Karst Kogen) runs along the Ehime-Kochi prefectural border at around 1,400 meters, and the paved-to-gravel road traversing its spine from Tengu-kogen plateau east toward the Tsuro district is one of the finest highland drives in western Japan. The karst itself is raw limestone country — white rocky outcrops jutting from emerald grassland, cattle wandering freely across the road without warning, and drop-offs on both sides of a ridge barely wide enough for two vehicles to pass. The forestry tracks branching south off the main Kogen road toward Kochi drop fast and rough, with loose gravel, off-camber corners, and sections that wash badly after heavy rain.
The main spine road is manageable in a capable AWD vehicle with moderate clearance; the side forestry tracks need high clearance and preferably lockers. Snow and ice make the road treacherous November through March, and seasonal gates enforce the closure. Fuel up in Matsuyama or Susaki — there is nothing on the plateau. Pack water and food for the day; no services exist up top. Free camping is available near designated pull-offs. The payoff is a 360-degree ridgeline that few tourists ever reach: ocean to the south, layered mountain ranges to the north, and absolute silence broken only by cowbells and wind.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | High Clearance, Overland Route, Scenic Drive |
| Surface | Dirt, Gravel, Mixed |
| Features | Camping, High Altitude, Remote, Scenic |
| Length (miles) | 29 mi / 46.7 km |
| Duration | 1 day |
| Max elevation (ft) | 4757 ft |
| Best season | May-October |
| Minimum vehicle | AWD with moderate clearance |
| Nearest town | Kumakogen, Ehime |
| Land manager | Ehime / Kochi Prefecture Forestry Division |
| Permit required | No |
| Cell service | Spotty |
| Water crossings | No |
| Dispersed camping | Yes |
| Official sources | Ehime Prefecture Official Site Kochi Prefecture Official Site |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Can a stock AWD SUV handle this trail, or do I need a lifted rig?
A stock AWD with moderate clearance — think RAV4 or Forester — can manage this route in dry conditions. The gravel forest road has rough sections and some ruts, but nothing that demands a lifted rig. Avoid it after heavy rain if you're running street tires.
When does the trail close for winter, and is snow a real concern?
The best window is May through October. At nearly 4,800 ft elevation, snow and ice are legitimate hazards from November through April, and sections of the forest road may be gated or impassable. Check with Ehime or Kochi Prefecture Forestry before attempting outside that window.
Are there permits or fees to drive this route?
No permit or entry fee is required to drive the forest road. It crosses prefectural forestry land managed by both Ehime and Kochi — keep an eye on seasonal road closures posted by those agencies, but there's no paid access or registration system in place.
What's the hardest section and what should I actually expect?
The roughest stretch comes along the karst ridgeline where the road narrows, the surface gets loose, and there's minimal runoff drainage after rain. You'll also be sharing the road with free-roaming cattle — they don't move fast and they don't care about your schedule. Take it slow and watch for sudden dropoffs on blind corners.
Is there any place to refuel or resupply along the 29 miles, or do I need to top off in Kumakogen before heading out?
Top off in Kumakogen before you go — there are no gas stations or resupply points on the route itself. Cell service is spotty across most of the ridgeline, so don't count on navigation or emergency calls working reliably. Carry enough fuel, water, and food for the full day plus a buffer in case you overnight at one of the dispersed sites.
Trail track
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