Radnor Lake is day use only and is protected as a Class II Natural Area, so the trails are strictly used for hiking and wildlife observation.
Trails are off limits to pets, jogging, and bicycles.
Take I 65 to Harding Place, Exit 78. Travel west on Harding Place (or Battery Lane) to Granny White Pike. Turn left and travel south to Otter Creek Road and turn left (across from Granny White Market).
http://www.tripleblaze.com/trail.php?c=3&i=5511