For a close-up view of the Chihuahuan Desert in Big Bend National Park, the 3.8 mile (round trip) Mule Ears Trail
is a good choice. It does not pass any 'spectacular geology', as promised by the NPS park brochure but the scenery is interesting enough. The usual destination is the spring of the title, a year round water source at the centre of an oasis of cottonwood trees and bushes - quite a contrast to the hot, arid surroundings - although the path does continue, meeting a much longer trail that connects the Chisos Mountains with the Rio Grande.
The land in this part of Big Bend National Park is low in elevation, with no shade and temperatures likely to rise above 100°F most of the time from May to September so the trail is best avoided during the middle of the day in summer.
LocationMap of Big Bend National Park
The Mule Ears Trail starts at Mule Ears Overlook
, a short spur road on the Ross Maxwell Scenic Drive, 8 miles north of Castolon - the ears are twin pillars of black igneous rock, once part of the core of a volcano, that now rise above the desert several miles to the east. Most of the land hereabouts is undulating, stony hills with sandy ravines, all covered by well-separated desert plants - at least a dozen species of cacti plus the usual sotol
. The route is across the side of a shallow hillside, along a more level section and down into a wide watercourse, then up the far side, along a flat ridge and across a second dry canyon.
The spring is at the far side of the second canyon, at the centre of a large area of greenery. Nearby is the remains of a stone dwelling, with old pipework leading to the stream. Clear, drinkable water always flows, but the volume is reduced to a trickle in dry weather, with a pool a few inches deep. The stream usually sinks below ground after a short distance.