MacGregor is a 10.3 mile trail located near Indianapolis, Indiana. The trail is primarily used for road biking. 10.3 miles 242 feet road biking Expand Map VIEW FULL MAP Sign up now to see this map! Reviews (2)Photos (0)Recordings (0)Elena Tatemountain biking2 months agoA couple spots were interesting. At least we went for a ride.Alan Bournemountain biking2 months agoWe could have stayed home and rode around town. This was way to urban.