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).
State Nature Park with lots of trails ranging from easy to strenuous, Up and down hills or just walk around the lake. Best lighting for the autumn colors is mid to late afternoon and just before the sun sets.