1 Boot:
Easy relaxed walking, usually along the flat or with a few low hills involved. Suitable for inexperienced hikers.

2 Boots:
More challenging walk, and usually longer (4-5 hours) but still within the endurance and capability of most walkers. Would not involve hills as high as 500 metres.

3 Boots:
Requires endurance and not suitable for walkers who have difficulties in high places. 3 boots maybe allocated to a walk because of its length and/or because it involves elevations over 500 metres and/or tough walking. Not recommended for novice hikers.