Iowa Army Ammunition Plant Restricted Access Trail
WWII munitions plant turned wildlife preserve
The Iowa Army Ammunition Plant’s 19,000 acres harbor some of the state’s best remaining native prairie and oak savanna, accessible only through guided tours on old military service roads. Built in 1941 for World War II munitions production, the facility’s bunkers and rail spurs still dot the landscape among restored wetlands and grasslands. The main loop passes the original ordnance testing range where unexploded ordnance occasionally surfaces — hence the strict access controls.
Easy to moderate difficulty on maintained gravel roads, though some two-tracks require high clearance during wet periods. Any capable vehicle works for the main routes. Access strictly by appointment through scheduled tours — no independent exploration allowed due to legacy contamination concerns. Spring and fall offer best wildlife viewing when migratory birds use the restored wetlands. Fascinating glimpse of Iowa’s industrial war effort and subsequent environmental restoration.
Trail Specs
| Difficulty | Easy |
|---|---|
| Trail Type | Scenic Drive |
| Surface | Gravel |
| Features | Historic, Remote |
| Length (miles) | 12 mi / 19.3 km |
| Duration | Half day |
| Max elevation (ft) | 920 ft |
| Best season | April-November |
| Minimum vehicle | Stock SUV |
| Nearest town | Middletown, Iowa |
| Land manager | US Army Corps of Engineers |
| Permit required | Yes |
| Cell service | Decent |
| Water crossings | No |
| Dispersed camping | No |
| 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
No recent condition reports. Be the first to post one.
Log in to post a condition report.
Frequently asked questions
Can a stock SUV handle this trail?
Yes, any stock SUV or high-clearance vehicle can easily handle the maintained gravel roads. Even a Subaru Outback would be fine.
Is the trail accessible in winter?
No, access is restricted to April through November only. The Army Corps closes the facility during winter months.
What permits do I need to drive this trail?
You must obtain advance permission from the US Army Corps of Engineers before entering. This isn't a drop-in trail - call ahead for access approval.
What's the most challenging part of this trail?
There really isn't one - it's all maintained gravel roads with minimal elevation change. The 'difficulty' is getting permission to access it.
Is there cell service on the trail?
Yes, cell service is decent throughout most of the route since you're not in deep wilderness terrain.