Suitable for most people. The walk is under 5 miles and some of the routes could be done in trainers instead of walking boots.

These are either longer walks with small amounts of ascent, or short walks with a moderate amount of ascent.  Suitable for most people with good general fitness.  The walk is likely to be between 5 and 10 miles. Paths and tracks are easily walked in any weather, there are no significant navigational difficulties.

The walk is likely to be more than 5 miles and involve at least 1000' of ascent. There may some more awkward obstacles and places where navigation involves more thought and skill. The walk should be done in boots.

The walk goes into regions where exposure to weather and difficult terrain means that walkers should always be equipped with proper footwear, spare clothing and food and drink. Map and compass skills are necessary, though they may not have to be used. The route may require some mild scrambling - the use of hands as well as feet - but the dangers are limited.

These walks are for the experienced walker who is comfortable with walking long distances involving a good amount of ascent.  Suitable for those with good fitness, stamina and hillwalking skills. The walk reaches higher altitudes (e.g. over 2,000ft) where weather conditions can change rapidly. There may be sections where the path is exposed or difficult and a fall could be serious. Walkers must be fit, familiar with this type of terrain, and equipped for every eventuality. Walking the route in winter might require specialist skills.