Glossary

Complex Terrain

Credit
Mark Bender

Complex avalanche terrain

Complex terrain is one of three levels of terrain classification described by the Avalanche Terrain Exposure Scale (ATES). It involves exposure to multiple overlapping avalanche paths, large expanses of steep, open terrain, multiple avalanche starting zones, and terrain traps below. Minimal options exist to reduce exposure. Complicated glacier travel through extensive crevasse bands or icefalls may be required.