Fifty years ago, one heard that Colfax Avenue was the longest street in the US, or maybe the world. I got a lot of exercise in my Denver days, some of it runnin

Fifty years ago, one heard that Colfax Avenue was the longest street in the US, or maybe the world. I got a lot of exercise in my Denver days, some of it running or hiking, but I also spent a lot of time in cars.