Why are half of North County San Diego streets closed tomorrow? What's Lance Armstrong's stolen, since recovered, time trial bike for, anyway? The answer to these questions, and many more, is the AmGen Tour of California.

Tomorrow marks the last stage of the the race that started on President's day in Davis. The final stage will begin in Rancho Bernardo and end in Escondido. If you need to go through Esco tomorrow, just ride your bike.

I've been following Lance Armstrong on twitter, and he told the tiwtterati about the race's leader, Levi Leipheimer.

Levi was promptly twitter-bombed to all hell by Lance's followers.

Follow Lance Armstrong on twitter!

Follow Levi Leipheimer on twitter!