the avg person (key word is avg) can walk 20 miles in a day with a 50 lbs pack,i dont recomend this if u dont have the stamina or endurance to do so,cause you will walk the bottoms of ur feet off litterally and start working on ur ankles next,and my experiance is about 20 miles a ride as well,distance does vary,alot of things go into the equation,best advice.....lots of sox lots of water,super light pack and plenty of good karma