The
Island in the Sky region of Canyonlands National Park is accessed by UT 313, forking off US 191 11 miles north of Moab, from where the end of the road at Grand View Point is 22 miles. The UT 313-US 191 junction is 20 miles south of interstate 70 (exit 182).
Canyonlands National Park overview map.
PDF format map of Canyonlands National Park, from the National Park Service (428 kb).