I attached my GoPro to my bike helmet for my bike ride on Saturday. It's a very hilly ride, but the uphill video doesn't show just how steep it is (20% gradient).
This one is on the way back going downhill: this is a single track road, not a bike trail. Mute the sound as all you'll get is the sound of wind.
This one is on the way back going downhill: this is a single track road, not a bike trail. Mute the sound as all you'll get is the sound of wind.