Complex Terrain
Complex terrain has exposure to multiple overlapping avalanche paths or large expanses of steep, open terrain. Here, there are multiple avalanche start zones, many terrain traps below the open terrain, and minimal options to reduce exposure. Check out the slideshow for examples of complex terrain:
This terrain contains a variety of complex features including large and small avalanche paths, steep slopes, and terrain traps. There are limited options for safe access and exposure to avalanches is significant, even at lower elevations on less steep slopes. Managing this kind of terrain in all but low danger requires advanced skills and experience.
Monashee Powder Snowcats 
These avalanches paths feature multiple start zones in the alpine, reducing the options for safe travel through this area.
Avalanche Canada 
This is wide-open, steep terrain with numerous convexities, terrain traps, and the potential for very large avalanches.
Drew Nylen Travel in complex terrain requires a thorough assessment of conditions, advanced route-finding and terrain-assessment skills, and a diligent approach to all aspects of avalanche risk management. If you lack experience or are unsure of your skills, it is best to stay out of complex terrain unless conditions are entirely favourable. If this is the type of terrain you seek out, be patient and wait for the right conditions.