I have a friend with Dementia who I used to bike ride with. He was fairly advanced in the illness having lost his drivers license and could still ride. He finally became a risk to himself and others so we quit riding. I worked at a residence facility for disabled. Kids at the facility were taught how to run and ride bikes etc for the Special Olympics . One of the residence, in his twenties when I worked there, if he got Out of the facility and got a hold of a bike he could get 30 miles in in a very short time. I think his longest escape was 60 miles. Riding a bike is apropos of nothing!