ambulation

n. process of walking from place to place

Walking is the main form of animal locomotion on land, distinguished from running and crawling. When carried out in shallow waters, it is usually described as wading and when performed over a steeply rising object or an obstacle it becomes scrambling or climbing. The word walking is derived from the Old English walkan (to roll).
See more at Wikipedia.org...

Walking /walk·ing/ 1. progressing on foot. 2. gait. sleep walking somnambulism. walking a normal slow gait in all species. [more]Ambulation - Community and Resources

Noun
1. walking about; "the hospital encouraged early ambulation"
(hypernym) walk, walking
(derivation) ambulate

n. ambulation, process of walking from place to place