It took Mark Gibson 10 days longer than even his most pessimistic prediction to complete the Tour Divide bike race, a 2,745-mile off-road trek from Canada to the U.S.-Mexico border. Along the way he …

On Friday morning, in the parking lot of a YMCA in Banff, a town in Alberta, Canada, Mark Gibson will point his mountain bike south and start pedaling. If everything goes well — and he’s …