Sawmill Road to Mount Locke — Davis Mountains High Desert Observatory Approach via Limpia Creek
Texas sky island — dark skies, thin air, wide open.
The Davis Mountains are the most underrated range in Texas, and the back roads threading through them prove it fast. Starting from Fort Davis, you can pick up the loop through Limpia Canyon and work north and west via forest roads through the Coronado National Forest-adjacent highlands — past ranches, through juniper-pinyon woodland, and up toward the flanks of Mount Locke where the McDonald Observatory sits at 6,800 feet watching the darkest skies in the Lower 48. The road surface shifts from paved to caliche gravel to two-track dirt as you push deeper into the range. Keep an eye out for mule deer and the occasional Montezuma quail crossing the track.
This route is accessible to most high-clearance 2WDs on dry days, but sections turn greasy fast in the summer monsoon season — and the Davis Mountains get real monsoons, not the token afternoon sprinkles you see elsewhere. June through August you’ll fight afternoon thunderstorms; September and October are the sweet spot. No permit required on the state and county roads, though the McDonald Observatory access road has its own visitor rules. Fort Davis is your last fuel and provisions stop. Dispersed camping is available on BLM and state land parcels around the range. The night sky up here is legitimately worth staying for.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | High Clearance, Overland Route, Scenic Drive |
| Surface | Dirt, Gravel, Mixed |
| Features | Camping, High Altitude, Historic, Remote, Scenic |
| Length (miles) | 45 mi / 72.4 km |
| Duration | 1-2 days |
| Max elevation (ft) | 6800 ft |
| Best season | September to November |
| Minimum vehicle | High-clearance 2WD (4WD recommended) |
| Nearest town | Fort Davis, TX |
| Land manager | Texas Parks and Wildlife / BLM Pecos District |
| Permit required | No |
| Cell service | Spotty |
| Water crossings | No |
| Dispersed camping | Yes |
| Official sources | Texas Parks & Wildlife — Davis Mountains BLM Pecos District Office |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Can a stock Tacoma or 4Runner handle this trail, or do I need a lift?
Stock high-clearance trucks like a Tacoma or 4Runner are fine. The trail is rated moderate on mixed dirt and gravel — no rock crawling, but washboards and rutted sections make 4WD useful on the steeper grades near Mount Locke. A lifted rig isn't required, just unnecessary pavement skids.
When does this trail typically close or get sketchy due to weather?
Summer monsoon season (July–September) brings flash flooding risk along Limpia Creek — conditions can go bad fast with zero warning. Winter sees occasional snow and ice above 6,000 feet that makes gravel grades slick. September through November is the sweet spot: dry roads, cooler temps, and some of the best dark skies in Texas.
Do I need a permit to run this route or camp out here?
No permit needed for the BLM dispersed camping sections along the route. Davis Mountains State Park requires a standard Texas State Parks day-use or camping fee if you enter park boundaries — currently $5–$7 per person per day. No advance reservation is required for dispersed camping on BLM land.
What's the hardest section of this trail and what should I actually expect?
The steeper graded climbs approaching the 6,800-foot elevation near McDonald Observatory are where most people feel it — loose gravel, tight turns, and no guardrails. It's not technically difficult, but the exposure and grade demand attention, especially if you're towing. Thin air is real at this elevation; turbocharged rigs won't notice, naturally aspirated engines will.
How far is the nearest gas station, and is there reliable water along the route?
Fort Davis is your last reliable fuel stop — tank up before you leave town. There's no gas on the 45-mile route. Limpia Creek runs through portions of the trail but treat any water before drinking; the creek can also be dry depending on season. Carry at least 2 gallons per person given the remote exposure and spotty cell service throughout.
Trail track
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