This cannot be answered with any certainty: first they did not walk every day, significant parts of the trip were by horse or boat.
However the average distance traveled everyday can be estimated from an estimate of the total distance traveled (about 7600 miles) and the total time spent (two years, four months and ten days or about 862 days). This gives an estimate of the average miles traveled per day at 7600/862 = about 8.817 miles/day.
This was very typical of the period of time, at the very best one could rarely travel more than 10 to 15 miles/day. On stagecoach routes with horse teams being changed at least every 10 miles, "good" dirt roads, and in good weather one might be able to travel 40 to 50 miles a day, but there were few stagecoach routes even that long within the US at that time. In the area Lewis and Clark were exploring there were no roads at all, at best there were narrow Indianian trails at worst nearly impassible mountains. Most of the trip mileage was by boat, as the Missouri, Snake, and Columbia rivers were the nearest thing to "highways" in the areas through which they flow at that time.
Their were 2000 miles that Lewis and Clark had to travel
They traveled about 10,000 miles on the way there. And on the way back they took an alternate route and traveled 15,069 miles.
447 miles
26 miles...or 40 minutes travel time
about 28 miles (when you travel shortest distance)
They traveled an average of exactly 17.5 miles a day. 2212/126.4 = 17.5
568 miles
People can travel by plane from Beaverton, OR to Chicago, IL in 3 and a half hours. There is approximately 1,765 miles between the two cities.
Last year (2012), Pioneer 10 was 1.6*1010 kilometres from the earth. Pioneer 11 was 1.3*1010 km away.
on average they can travel 1000 miles....in one day
It took them approximately six months to travel the 2000 miles from Independence, Missouri to their final destination in the Oregon territory.
an average hamster can travel at a speed of 5 miles per hour
At least 16 miles.
Total Travel Estimate: 15 hours 8 minutes / 1002.68 miles.
Given is the calculated distance as well as the driving travel time, which does not take into account driving conditions, traffic, etc. The distance between Sisters, Oregon and Redmond, Oregon is 19.6 miles. The resulting travel time is 26 minutes.