The longer a tour lasts, the more time is needed for planning it and the heavier is the packing list. Especially multi-day tours require exact logistics when it comes to food and drink, a realistic assessment of physical fitness and a constantly updated weather forecast. In general, it's much better to stop a tour earlier than to experience a sudden drop in temperature in the high mountains. Further useful advice for safe mountain hiking is provided by the general hiking recommendation and the international do's and don'ts mountain rules.