MacGregor is a 10.3 mile trail located near Indianapolis, IN. The trail is primarily used for road biking. 10.3 miles 246 feet road biking Expand Map Sign up now to see this map! Reviews (2)Photos (0)Recordings (0)Elena Tatemountain biking21 days agoA couple spots were interesting. At least we went for a ride.Alan Bournemountain biking21 days agoWe could have stayed home and rode around town. This was way to urban.