Indian Springs Trail can be found at the Dausset Nature Center
If you follow the signs correctly it will lead you to the start of the trail. However, it also has its own parking lot on the east side of the trail ($5, or park at Dausset for free).
This is the best 3mi middle GA can offer, always enjoyable to ride. Most of the trail borders the scenic Macintosh lake with a few bridge crossings throughout the trail. Not much technical riding here but fast flowing downhills and uphills that will make you pay if you're on your brakes. One uphill section can trip up even experienced riders.