Go back up to I-70, take that to UT-24 through Hanksville past Capitol Reef to Torrey, take UT-12 to Bryce Canyon. UT-12 is one of the most scenic drives you will find anywhere. Depending on time, you could then go to Zion or go through Panguitch to UT-143 through Cedar Breaks (IF IT'S OPEN) to UT-14 to I-15.