Track your rides and runs via your iPhone, Android or GPS device, analyze your performance, and compare with friends.
Headlands? You where never there during your whole run! ;-) Looks like a good one.
Us city folk group everything from the GGB to the Oregon border the headlands.
You're right, technically, it is actually all headlands. Us Marin folk need to be less envirocentric to think that there's only one headlands, and it's ours.