Level of difficulty *	Easy tours without special physical demands.
Level of difficulty **	Tours with low physical requirements.
Level of difficulty ***	Medium straining tours, which can be mastered by good health and average condition and endurance.
Level of difficulty ****	Challenging tours with numerous physical efforts. Physical and psychological strain.
Level of difficulty *****	Extreme challenging tours, which require outstanding physical condition and highest psychic capacity. Excellent team work skills and extensive alpine experience are urgently necessary.