Walking vs Hiking Topic

TK74 07/28/10
What constitute the difference? The terrain? It's a big difference on calorie burning calculators. Would like clarification. I live out on the country. My drive is rocky and has rolling hills. Is it a walk or a hike? I can't go at a fast pace because of the roughness of the terrain and if I'm not careful I could lose my footing and fall. So what do you think my exercise falls under?

Clarity 04/08/11
Morning, found a basic hiking calorie calculator at this site: http://www.glamour.com/health-fitness/activity/calculators/hiking

Walking vs Hiking