Kiamichi Mountains Iron Ore Railroad Grade
Abandoned railroad through forgotten mining country
The Iron Ore Railroad Grade follows the abandoned Kansas City Southern spur that hauled iron ore from the Rich Mountain mines down to the mainline at Mena, Arkansas. Built in 1914 and abandoned after the ore played out in 1956, this railroad bed cuts through some of the most remote country in the Kiamichis. The signature obstacle is Tunnel Rock, where blasters carved a narrow passage through solid sandstone — your mirrors will get a workout threading modern rigs through Depression-era clearances.
Expect technical rocky sections, washouts where bridges once stood, and the occasional ATV traffic on weekends. Spring brings wildflowers but also the worst washouts; fall offers perfect weather and solid trail conditions. Stock 4WD handles most sections, but you’ll want sliders for the rockier passages. No permits needed, but the Forest Service closes sections during heavy rains. This trail pays off with genuine history and some of Oklahoma’s most rugged mountain country, far from anything resembling a crowd.
Trail Specs
| Difficulty | Difficult |
|---|---|
| Trail Type | Historic, Technical 4x4 |
| Surface | Rock |
| Features | Historic, Remote, Scenic |
| Length (miles) | 24 mi / 38.6 km |
| Duration | 1-2 days |
| Max elevation (ft) | 2650 ft |
| Best season | October-April |
| Minimum vehicle | Stock 4WD with skid plates |
| Nearest town | Heavener, Oklahoma |
| Land manager | Ouachita National Forest |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Official sources | fs.usda.gov |
| Start coordinates | |
| End coordinates | |
| Copy both for Google Maps directionsClick to copy the directions URL · or open it directly in a new tab | |
| Find on Google | Search on Google → |
Location
Trail Conditions
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Frequently asked questions
Can a stock 4Runner or Wrangler run this trail without modifications?
A stock 4WD with skid plates is the baseline — the railroad grade throws sharp rock and ledge sections that will punish unprotected underbodies. Lift and all-terrain tires aren't required but they help; stock suspension and highway tires are a bad idea on the technical rock sections.
Is the trail passable in summer?
Technically yes, but the best season runs October through April for a reason — Oklahoma summers bring extreme heat, overgrown brush choking the old grade, and wet conditions that turn clay sections into grease. Fall and winter keep the trail clear and temps manageable for a 1-2 day run.
Do I need a permit to drive this trail through Ouachita National Forest?
No permit is required to drive the trail, but you're on Ouachita National Forest land managed by the USFS — standard forest rules apply for dispersed camping (14-day limit, leave-no-trace). Check the Ouachita NF site or call the Heavener Ranger District before you go for any temporary closures.
What's the hardest section and what makes it technical?
The rock sections mid-trail are the crux — the old railroad bed breaks down into exposed chert and sandstone slabs with no maintained line, and off-camber shelf sections leave little room for error. Lockers or at minimum good articulation matter here; this is where stock street tires and timid throttle management will get you stuck or hung up.
Are there water crossings and how deep do they get after rain?
Yes, there are multiple water crossings along the 24-mile route, and after significant rain they can rise fast in the Kiamichi Mountains — depth varies but crossings that are ankle-deep in dry conditions can become impassable after heavy rainfall. Check recent weather before you leave Heavener and budget extra time; there's zero cell service on trail to get updated conditions once you're in.
Trail track
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