DragonflyTV . Podcast - Mountain Bike | PBS KIDS GO!

Source : http://pbskids.org/dragonflytv/show/mountainbike.html...

We bike on some of the wildest rock formations in the country. It's all sandstone here in Moab, Utah, but the trails feel different when we're biking. Sometimes it's rolling hills and sometimes it's ledges and dropoffs. No two trails are quite the same; each one challenges us in a different way. We want to know why these trails are so different!