Alkali Flat Trail

Alkali Flat Trail is a strenuous 5-mile out-and-back from the end of Dunes Drive to the edge of Alkali Flat, then back the same way. Choose it when you want to get inside the White Sands dunefield rather than just look across it from the road. Allow about 3–4 hours: the soft gypsum sand and repeated climbs make five miles feel longer than a firm trail. Despite the name, this is not a flat stroll. It is a foot-travel-only route, and you don’t have to reach the lakebed to enjoy the dunes; the park notes that a shorter walk can still be worthwhile.

There is no built tread to follow across the dunes; red diamond markers carry the route. Keep looking for the next marker before you climb or drop over another ridge. If blowing sand or a downed post hides it, turn around for the trailhead. Footprints can disappear or lead away from the marked route, and spring winds can cut visibility to only a few feet. The current marked route goes 2.5 miles to Alkali Flat and returns the same way. Older route descriptions show a loop, so don’t assume there is a separate return leg.

Expect repeated climbs and descents over dunes as high as about 60 feet. The surface is loose gypsum rather than a firm path, so each rise takes work. From the crests, the view opens over ridge after ridge of white sand, with the San Andres Mountains beyond. That scale is the reward, but the repeating shapes can make distance and direction harder to judge; keep the markers in view instead of choosing a tempting-looking line across the sand. Visitors often call out how immersive and quiet the landscape feels once the road is behind them.

Alkali Flat is the dry lakebed at the far edge of the walk, not a summit. During the last ice age, Lake Otero covered about 1,600 square miles of the Tularosa Basin. The lakebed gives the trail its destination and makes the change from rolling dunes to open flat country easier to read. Before turning around, look back across the dune ridges toward the mountains; layered white ridges against the range make a strong composition, and a person several ridges away helps show how broad the landscape is.

There is no shade or water on the trail, and the parking area has the route’s only toilet. Use the vault toilet at the lot and fill water at the visitor center before heading down Dunes Drive. Summer temperatures can exceed 100°F; the park advises against starting at 85°F or hotter and says spring wind can make the markers hard to see. Be off the trail by sunset. Dogs are allowed on a leash no longer than six feet.