Alkali Creek Road
Endless prairie where the soil runs white with alkali
Alkali Creek Road cuts a lonely line through 40 miles of Buffalo Gap National Grassland’s most remote corner, where the soil turns white with mineral deposits and the horizon stretches endlessly in every direction. The route starts near Interior and winds through mixed-grass prairie and badland breaks, crossing several seasonal creek beds that can turn treacherous after prairie storms. The highlight is the old Alkali Creek Homestead ruins at mile 22, where a stone foundation and windmill skeleton mark where someone tried to make a go of it in this unforgiving country.
This is moderate difficulty—more about navigation and weather than technical driving, though the creek crossings and muddy stretches demand high clearance and 4WD in wet conditions. Stock trucks handle it fine in dry weather, but carry extra water, fuel, and a good map since cell service disappears after the first few miles. Best tackled spring through fall when the roads are passable and the wildflowers make the emptiness beautiful. It’s a reminder that South Dakota’s got plenty of country where you can drive all day and see maybe three other vehicles.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Overland Route |
| Surface | Dirt |
| Features | Camping, Historic, Remote, Scenic |
| Length (miles) | 42 mi / 67.6 km |
| Duration | 1 day |
| Max elevation (ft) | 2980 ft |
| Best season | April-October |
| Minimum vehicle | High-clearance 2WD |
| Nearest town | Interior, SD |
| Land manager | Buffalo Gap National Grassland |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Start coordinates | |
| End coordinates | |
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| Find on Google | Search on Google → |
Location
Trail Conditions
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Frequently asked questions
Can a stock Tacoma handle Alkali Creek Road?
Yes, any high-clearance 2WD vehicle can run this trail. The dirt surface is generally smooth with some ruts, but nothing requiring 4WD or aggressive tires.
Is Alkali Creek Road passable in winter?
Not recommended October through March due to snow and mud that can make the alkali soil impassable. Best access is April through October when conditions are dry.
Do I need permits for Buffalo Gap National Grassland?
No permits required for driving or dispersed camping. It's public land managed by the Forest Service with free access.
What's the toughest part of this 42-mile route?
The middle section can get rutted after rain, and navigation requires attention since it's unmarked two-track through open grassland. Bring a GPS or good maps.
Where can I camp along Alkali Creek Road?
Dispersed camping is allowed throughout Buffalo Gap National Grassland. Look for established sites away from the main track, but expect zero amenities and no water sources.