Last summer we really got into biking. We biked, walked or ran nearly every day during the summer. My 6-year old son was able to complete a 13-mile trek with me. He got a new bike for his birthday, however, his birthday is in November so he hasn't been able to try it out much yet. I don't know the kind of bike I have, except that it's a Huffy mountain bike. Nothing special I'm sure. Since I mostly ride with my son we usually stick to bike trails, nothing off the beaten path. I'd love to get into more of that soon though. My brother dropped a couple grand on his most recent bike. He's a lot more hardcore at this than I am. His last ride of the fall was a 70+ mile trek through Colorado I believe.