The idea started back in February when co-workers and friends Holly McCollough and Floyd Pierce discovered the Colorado Passport Program, which, in part, challenges people to get to all 64 counties of Colorado by the end of the year. For them, that wasn’t challenging enough. They decided, instead, to drive through all 64 counties of Colorado in 64 hours. The idea stayed as a question mark in McCollough’s calendar until Leilani Osmundson joined …