Park in the lot right on the west side of HWY 9. (Gateway Drive)
The climb starts straight out of the lot and doesn't let up until you get to the top. It's rideable for most folks, but grueling. You'll pass through a lot of dying forest (Pine Bark Beetles) and some nice Aspen stands.
From the top, continue downhill to reach the junction with Peaks Trail. From here, you can continue left on Miners Creek Trail, which goes up and around the Ten-Mile Range. Or you can turn right and go down the Peaks Trail all the way to Frisco.
But if you're just turning around at the top of Gold Hill... stretch your hands (and your smile muscles) before for the downhill as you'll be holding on for dear life with few breaks.