So we have a great loop drive for you now: from Aspen, southeast via U.S. 82 / U.S. 24 to Buena Vista, then up Cottonwood Pass Rd (306 RD / FR 306) to Taylor Park Reservoir, from there first south and then southwest on FR 742 down Taylor Canyon. When you hit U.S. 135, head southwest for another 8 miles or so, then turn right (north) on 730 RD which brings you first to Ohio Pass and then, past the junction with 12 RD, to Kebler Pass. Continue on 12 RD (unpaved, but well graded) which will bring you to U.S. 133, near Paonia SP. Turn right towards Mc Lure Pass / Carbondale. In Carbondale, you´ll hit U.S. 82 again, from where you can drive back to Aspen.
Let us know how you liked it!