Challenging terrain has exposure to well defined avalanche paths, start zones, or terrain traps. Options exist to reduce or eliminate exposure with careful route finding. Check out the slideshow for examples of challenging terrain:
Travel in challenging terrain requires a more thoughtful approach, including a thorough assessment of conditions. Big slopes with serious consequences exist, so you will need good travel techniques to travel through them, and under some conditions they should be avoided entirely. There will be frequent points at which travel decisions will need to be made to manage risk based on the current conditions and options available.