Culebra Naval Ammunition Depot Access Roads
WWII bunkers and secret beaches on forgotten island
These forgotten military access roads crisscross the eastern end of Culebra, connecting the scattered remains of the U.S. Navy’s former ammunition storage facility. Built during WWII and used through the 1970s for target practice, the concrete bunkers and observation posts now sit empty among the scrub forest. The main route follows the old perimeter road from Dewey to Playa Brava, with spurs leading to hilltop observation bunkers that offer commanding views of the Culebra Sound and nearby cays.
Moderate difficulty suitable for stock high-clearance vehicles, though some technical sections around bunker sites require careful line choice through loose coral rock. Dry season (January-May) provides best conditions when seasonal streams are passable. No permits needed for the roads themselves, but respect private property boundaries. The route connects several primitive camping areas near secluded beaches, making it ideal for multi-day exploration of one of Puerto Rico’s most remote islands.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Backcountry |
| Surface | Gravel |
| Features | Camping, Historic, Remote, Scenic |
| Length (miles) | 12 mi / 19.3 km |
| Duration | Half day |
| Max elevation (ft) | 650 ft |
| Best season | January-May |
| Minimum vehicle | Stock high-clearance SUV |
| Nearest town | Dewey, Culebra |
| Land manager | Municipality of Culebra |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| 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 Jeep Wrangler or 4Runner handle this trail without modifications?
Yes, a stock high-clearance SUV is the minimum requirement. The gravel surface and moderate grades are manageable on factory suspension, but low-clearance vehicles like crossovers or sedans will get hung up, especially near the water crossings.
Is the trail accessible year-round or does hurricane season shut it down?
January through May is the best window — drier, cooler, and cleaner trails. June through November brings hurricane season, which can wash out sections and make the water crossings genuinely impassable. Check local conditions before you go.
Do I need a permit to drive this trail or access the old Naval Ammunition Depot grounds?
The land is managed by the Municipality of Culebra — no federal permit required, but check in with local municipal offices in Dewey before heading out, as access rules on former military land can change without much online notice.
What's the hardest section and what should I actually be ready for?
The roughest terrain shows up on the eastern stretches where the old depot roads have deteriorated and the water crossings add some uncertainty. Nothing requires a locker or lift, but you need to read the crossings before you commit — depth can change fast after rain.
There's no gas station on Culebra's eastern side — how do I plan fuel and supplies?
Fill up in Dewey before you leave — it's the only real option on the island. The trail is only 12 miles, but factor in the ferry crossing logistics and the fact that resupply on Culebra is minimal. Bring more water than you think you need; there's no cell service out there if things go sideways.
Trail track
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