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Glossary

Below Treeline Elevation

Credit
Raveneye Photography

A sledder plays in a meadow below treeline. Alpine and treeline zones can be seen in the distance.

This photo shows treeline and below treeline terrain.

Below treeline (BTL) is the elevation band of a mountain or range that is covered by forest. From its upper to lower limits, it often covers the greatest area and the greatest variation in snowpack conditions of any elevation band. Below treeline areas usually see less sun, wind, cold, and precipitation than higher elevation bands.