I ran into someone who claimed that she could not ride to downtown from Gardensprings (or maybe it was Gardenside), because it is too dangerous riding on Harrodsburg Road/South Broadway (HWY 68). While there will certainly be some debate about the actual level of dangerousness of riding on HWY 68 from Gardensprings to Downtown, I think it will be agreed that it would be an unpleasant route.
The good thing is that you can get from Gardensprings to Downtown without having to use HWY 68. Well, that's not entirely true. You have to ride on HWY 68 for a couple of blocks. But they are very quick blocks, and there is some semblance of a bike lane for that stretch.
Once again, the map saved in the "zoomed-in" mode. So you will have to zoom-out to see the ride all at once.
http://routebuilder.org/58s
I decided to start this ride from the intersection of Gardensprings Dr. and Alexandria Dr., just 'cause.
I have chosen the least busy streets possible. Sometimes this adds just a bit of extra distance to the ride. But pleasantness is worth going out of your way for. And if the way is the goal, then you're not going out of your way at all.
Please note that this route has you going through a hole in fence at the end of Devonshire Ave. If you do not like doing this kind of thing, then you should turn left from Addison Ave on to Unity Drive to get to Red Mile Rd. The result is, however, that you will have to bike on a somewhat busy stretch of road for a couple of blocks.
Also note that, when you are cutting through the Red Mile Race Track Property, just before you get to South Broadway, you will need to cut through the gas station to get to the stoplight.
Enjoy.