Hi DBrown, I appreciate the PM, but couldn't respond since I have less than 50 posts (won't allow me to send a PM). I used to trot with Ollie and his sister (a black lab) when they were young. They loved running next to the bike. I kept the leash in one hand. I used to keep a regular length leash. I was worried about a long leash as they would get ahead of me and cross over. With a shorter leash, I had better control and made sure they always stayed by my side and not ahead. We sometimes rode on the side walk and sometimes on the street. Really depended on the conditions. Common sense is the best rule. There is always a risk, but the benefits far outweigh it. A dog would much rather be outdoors enjoying running/trotting than sitting at home!
Thanks for the kind words!