tramping (?.)

• ambling
• ambulation
• backpacking
• footing
• footing it
• footwork
• going on foot
• hiking
• hitchhiking
• hitching
• hoofing
• legwork
• lumbering
• marching
• pedestrianism
• perambulation
• sauntering
• staggering
• strolling
• thumbing
• thumbing a ride
• toddling
• tottering
• treading
• trudging
• waddling
• walking