In Indianapolis there is the old Monon trail where there has been a fair amount of crime. I'd rather have motorists yelling at me than get robbed, stabbed or shot.
Monon Trail | Indiana Trails | TrailLink.com
On the weekends it's way too overcrowded with people from Bizzaro World. In Bizzaro speak "on your left" means scatter about randomly in any and all directions like super heated molecules. Chaos ensues.