Leave No Trace in the American Southwest — desert surfaces, water and waste

The desert floor is not empty dirt. In much of the Colorado Plateau, biological soil crust is a living community of cyanobacteria, lichens, mosses and other organisms that stabilizes soil and supports desert plants. One careless shortcut can damage a surface that recovers slowly.

National Park Service guidance at El Morro says mature crust can take 20 to 250 years to regenerate after damage. The range reflects different crusts and conditions; it is not a countdown for one footprint. The practical rule is simple: use established trails, bare rock and dry washes where local rules allow.

Learn to recognize vulnerable ground#

Mature crust can appear dark, knobby or textured. Young crust may be almost indistinguishable from loose soil, so “I did not see any” is not a safe test. If traveling cross-country is legal, choose continuous durable surfaces and avoid creating a chain of footprints through vegetated soil.

Never drive or park off the designated route to shorten a walk. Tire tracks widen impact far beyond a boot print.

Treat water as wildlife infrastructure#

Springs, tanks and troughs may be the only reliable water for wildlife or livestock. Local setbacks can be hundreds of feet and vary by unit. Do not camp, park, wash or linger near them. Never assume a mapped spring is potable or currently flowing.

Carry the full requirement plus emergency reserve. Water planning is part of resource protection: an unprepared group is more likely to trespass, disturb a source or require rescue.

Leave cultural material exactly where it is#

Potsherds, flakes, structures, rock images and historic objects are protected and meaningful in context. Do not touch, move, collect, rub, wet or trace them. Avoid geotagging vulnerable sites. Report damage or looting to the land manager.

Use a desert-specific waste plan#

Human-waste rules differ between high-use canyons, river corridors, desert flats and developed sites. Some areas require portable toilet systems or waste bags. Check the exact destination. Pack out toilet paper and hygiene products; never place waste beneath rocks.

Food scraps and rinse water attract wildlife and alter sites. Strain food particles and follow local gray-water rules.

Keep photographs on durable surfaces#

The urge to step ten feet off trail for a clean composition multiplies at popular viewpoints. Use the established foreground. If a photography location is already mapped, add a dated condition report instead of creating another path. Build sunrise-to-night photo sets from legal viewpoints without broadcasting fragile off-trail coordinates.

If you find abandoned waste beside an existing road or camp, map it with safe access and estimated bags. Do not cross crust or cultural sites for one piece of litter.

In the Southwest, leaving no trace begins with recognizing that surfaces that look barren may be the most easily damaged part of the landscape.