I have a 3 year old, 60 lb. Lab Mix. We walk her about 2 miles everyday. She needs more exercise. We just got bicycles and we took her for a bike ride today. We went about 1 mile and she was jogging nicely next to me. How far can dogs usually run without wearing them out to the point of exhaustion? I would like to go a few miles, while stopping to give her water, but I'm not sure if that's too much
Any advice
Any advice

Tell that to huskies and other "pulling" or "travelling" breeds. Many dogs have a biological need to travel large distances, which we have sort of tamped down by domesticating them and making it so that they don't have to search for their next meal.