Turn northwest (right if you are coming from denver) in the town of jefferson onto michigan creek rd. it's literally the only place to turn in town, and is right by the county building just up and across from the gas pumps. Follow that for a while and you will come to a y in the road with a bunch of trees off to the left. Stay to the right and follow that up in to the trees, it will lead you directly to the trailhead and you can go up and over georgia pass from there.
There is one turn before the y but it goes off at a right angle towards jefferson lake. Keep going to the y, will know it when you see it.