Big Bend Outer Mountain Loop: The 30-Mile Chisos Circuit, Planned
The Big Bend National Park Outer Mountain Loop is a backcountry circuit around the outside of the Chisos Mountains, commonly described as about 30 miles depending on which spur trails you add. Most parties take 2 to 4 days. It needs a backcountry permit at $10 per night, available at the Chisos Basin or Panther Junction visitor centers up to 24 hours ahead, or online through recreation.gov up to 180 days ahead. There is no reliable water on the low desert half of the loop, so water planning is the real trip-planning problem, more than the mileage. Go between November and April; the low sections are dangerously hot the rest of the year. Our Big Bend desert weekend itinerary covers a shorter day-hike version of the same country.
Big Bend National Park Outer Mountain Loop: The Route
The Outer Mountain Loop combines several named trails into one circuit around the outside of the Chisos high country: typically the Pinnacles or Laguna Meadow trail up out of the basin, the high traverse past the South Rim, and the Dodson Trail dropping down into the low desert on the west side before Blue Creek Canyon climbs back up into the basin. Total mileage is usually put at around 30 miles, and it varies a little depending on whether you add the South Rim overlook spur or take Pinnacles versus Laguna Meadow on the way up. Confirm the current mileage and any trail or water source closures with a ranger when you pick up your permit, since conditions and official figures can shift.
Elevation and Terrain
The loop crosses from high-elevation pine and oak forest in the Chisos basin, above 5,000 feet, down to low desert scrub well under 3,000 feet on the Dodson Trail section, then back up. That swing is the whole character of the hike: cool mountain hiking at the start and end, exposed desert walking with little shade in the middle, on rough, sometimes loose trail.
Water: The Real Planning Problem
There is no dependable water source on the desert half of the loop. Most backpackers solve this by caching water along the route or arranging a vehicle drop, rather than carrying everything for the full 2 to 4 days from the start. Rules and access for caching change by season and by trail condition, so this is exactly the kind of detail to confirm in person at the visitor center when you get your permit rather than plan around something you read online months ago. Whatever your plan, carry more water than feels necessary; the desert section has no shade and no shortcuts back to a road.
Permits and Fees
- $10 per night for overnight backcountry use, covering backpacking and primitive camping.
- In person: at Chisos Basin or Panther Junction visitor centers, up to 24 hours before your trip.
- In advance: through recreation.gov, up to 180 days ahead, or by calling 1-877-444-6777.
- Group size: capped at 15 people per party.
Designated backcountry campsites along the loop are assigned when you get your permit, so you cannot camp wherever you like; plan your daily mileage around where sites actually are rather than an even split of the total distance.
When to Go
November through April is the standard window for any low-desert hiking in Big Bend. Summer heat on the Dodson Trail section is a real hazard, not just discomfort, and it compounds the water problem: more heat means more water needed on a route that already has none to find along the way. Winter can bring cold nights and occasional ice at the higher elevations, so pack for both ends of the temperature range even in a single trip.
Have Us Plan the Support
If you want the loop with a vehicle shuttle or water cache arranged rather than carrying everything yourself, tell us your dates and we will help put the logistics together. Planning is free, and we earn only if you book through us.
Keep planning with Big Bend Camping Guide and Santa Elena Canyon Trail.
Big Bend Outer Mountain Loop: The 30-Mile Chisos Circuit, Planned FAQs
About 30 miles, though the exact figure varies a little depending on which spur trails you add, such as the South Rim overlook. Confirm the current mileage with a ranger when you get your permit.
Most backpackers take 2 to 4 days, depending on fitness, how much water they are carrying or caching, and whether they add side trips to the South Rim.
No reliable water on the low desert half of the route. Most hikers cache water in advance or arrange a vehicle drop rather than carry everything from the start; confirm current caching rules with the backcountry office.
$10 per night for overnight backcountry use, available in person at Chisos Basin or Panther Junction up to 24 hours ahead, or through recreation.gov up to 180 days ahead.
November through April. The desert section gets dangerously hot the rest of the year, which makes the lack of water on the route much more serious.
Yes. The worked day-by-day plan is Big Bend National Park 3-Day Itinerary: Desert Hiking Weekend (3 Days), with the permits, the stays and the drive times already sorted. Tell us your dates and we will put it together for you and confirm what is genuinely open on those days. Asking is free: no card, no deposit, and nothing is held until you say yes.
