Marin County is believed to be the birthplace of mountain biking. Now, a local rider is trying to carve out trails despite ...

The Phoenix police helicopter was used to lift the man off the trailhead. He was taken to a hospital for treatment.

Get down and dirty clicking through the pics of GrindTV's top mountain bikers to follow on Instagram. From dirt jumpers to enduro and more, we've got 'em all. If you exclude New England ...