The northern end of this route is in Cannonville; its southern terminus is at U.S. 89 just east of Kanab [1] (46 miles one-way). From the northernmost stretch of this road, Bryce Canyon [2] rises to the west; about six miles from the southern end and off to the east on private land (look from the road, don’t trespass) is the set from the TV show Gunsmoke.
The unpaved portions of the road are usually in good condition, except after rains, when the bentonite soils that comprise the roadbed turn to goo. In good weather, cars can usually make the journey.
The road follows the Pink and White Cliff terraces of the Grand Staircase, with access to some excellent and comparatively undersubscribed hiking trails. Several steep slot canyons make for excellent canyoneering. The lower 16 miles of Johnson Canyon Road [3] are paved.
Links:
[1] http://www.moon.com/destinations/utah/zion-and-bryce/kanab
[2] http://www.moon.com/destinations/utah/zion-and-bryce/bryce-canyon-national-park
[3] http://www.moon.com/destinations/utah/the-escalante-region/grand-staircase-escalante-national-monument/sights-along-us-89