ARe you looking to have the dog run beside you or ride on bike with you? Some considerations -
dog's personality and what it was bred to do:
my current old rough collie will not run unless she has a specific purpose such as sheep or snacks- she never has - I have rollerbladed with the other dogs but not her - she would not go even as a young dog -running for the sake of running was never her idea of a good time; my hound dog mix would run all day; my other rough collie loved to rollerblade with me for to to three miles; my husky mix would run all day - but would kill little creatures if off leash - high prey drive; collie mix pup will run some but doesn't want to for more than a couple of miles. Breeds such as some hounds, sled dogs, dalmations(run along carriage) were bred to run; etc. I know and see people who run a lot with their boxers, border collies, australian shepards and cattle dogs.


dog's physical attributes: smushed in faces cannot breathe as well (pugs, bulldogs, etc); too small - can't keep up, too large - how to get them to car if injured on trail etc