Longest car ride -- 1993 - WORLD YOUTH DAY. I drove in a caravan of about 6 other cars from Arnold, CA to Denver, CO. (three days from one place to the other) with a bunch of teenagers, which was quite fun. In my car was my mom, my brother and my sister (who lasted until the 2nd pit stop then was replaced!).
On the aforementioned car trip, my 1985 Ford Bronco II began to make noises and do some rather strange things in the middle of NOWHERE - that would be Nevada! So, we stopped in this small town and had some guy take a look at it. He was pretty darned worthless, so the priest that was in our caravan threw some holy water on the car, blessed it and we where on our way. The first stay-over stop was in Ely, Nevada. They had a Ford dealership so in the morning I brought the car in. Evidently, the transfer case was out of fluid. They refilled it and we were on our way. The rest of the trip was great. When we got home, I had the car looked at more thoroughly, and when they took the cover off the transfer case, they found a pile of steel shavings which had been a good portion of the transfer case. I can't tell you how lucky we were that nothing happened.
Walking - we walked EVERYWHERE in Paris, hard to say how far that was.
I haven't biked in a long time, been meaning to invest in a new bike, soon, though.