4.9
(21)
237
hikers
01:48
7.12km
10m
Hiking
Hike the 4.4-mile Alkali Flat Trail in White Sands National Park, traversing soft gypsum dunes to the ancient Lake Otero dry lakebed.
Last updated: February 26, 2026
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122 m
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3.66 km
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7.12 km
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7.12 km
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7.12 km
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Wednesday 6 May
26°C
13°C
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This route was planned by komoot.
The Alkali Flat Trail is rated as strenuous. It requires continuous effort to hike through soft gypsum sand, ascending and descending numerous dunes. It is considered the most challenging established hike in White Sands National Park.
Despite its name, the trail is far from flat. It consistently traverses up and over steep, soft gypsum sand dunes for its entire length. The route leads to the edge of the Alkali Flat, which is the vast, featureless dry lakebed of ancient Lake Otero.
This trail offers an unparalleled sense of solitude and immersion in the vastness of the White Sands landscape. Its distinct lack of a traditional path, relying solely on spaced red diamond markers in an ever-shifting environment, makes it a unique navigational test. The destination at the ancient Lake Otero dry lakebed provides a glimpse into the geological past of the Tularosa Basin.
The average completion time for the Alkali Flat Trail is 3 to 4 hours, covering approximately 5 miles (8 km) round-trip.
The trail starts at the Alkali Flat Trailhead, White Sands National Park. Parking is available at the trailhead within the park.
Navigation is a significant challenge as the trail lacks a traditional path. It is marked by spaced-out red diamond symbols, which can be difficult to spot if obscured by blowing sand or knocked down, making it easy to become disoriented or lost. Always keep an eye on the markers.
You must bring ample water (at least one gallon per person), sun protection (hat, sunscreen, sunglasses), and appropriate footwear for hiking in soft sand. There is no shade, water, or toilet facilities along the trail, and summer temperatures can exceed 100°F (38°C).
The Alkali Flat Trail is not recommended for small children due to its strenuous difficulty and extreme desert conditions. Dogs are generally allowed in White Sands National Park, but they must be on a leash no longer than six feet at all times. Given the trail's difficulty and lack of water/shade, consider if it's appropriate for your pet.
The best time to hike is generally during the cooler months, from late fall through early spring, to avoid the extreme summer heat. Spring can bring strong winds, which may reduce visibility due to blowing sand.
Yes, there is an entrance fee to White Sands National Park. This fee covers access to all park facilities, including the Alkali Flat Trail. No additional permits are required for hiking this specific trail.
Hikers are enveloped by spectacular and surreal views of seemingly endless white gypsum dunes. The stark white sand provides a striking contrast against the often bright blue sky. In the distance, the San Andres and Sacramento Mountains frame the horizons. The trail also leads to the Alkali Flat Trail Overlook, offering expansive views of the ancient Lake Otero dry lakebed.
The GPS is dizzy, we trudged up and down dunes at least 200 meters in altitude
A video of the tour can be found here: https://youtu.be/yz-H3oRwdq0
This tour today showed us our limits a bit. Of course, we started again at midday in 32°C (90°F) and then walked through the hot sand in sandals (Birkenstocks, of course), and where it couldn't go any further, we continued barefoot. And again and again the climbs up the dunes and on...on...on. After what seemed like an eternity, we finally made it back to the car, thirsty. They always warn us about beginner mistakes, but the stupid ones never die out. When I arrived at the motel, I discovered this on my right heel, see picture 8.