How many people showed up for the Cannonball Run's promotional fun run?

A preview of the Cannonball Run, a Junction 311 Endurance Sports and Omega Sports Race Series event in October in Greensboro.

How many people showed up for the Cannonball Run's promotional fun run?
A few of the Cannonball Run fun runners on the Atlantic & Yadkin Greenway bridge over I-840 in Greensboro.