Little Wildhorse is an easily accessible classic 'slot' canyon in the San Rafael Swell.
Emery County paved the access road in 2010, five miles from Goblin Valley State Park, near Hanksville, so this area is now accessible in all conditions by all vehicles, except during flash floods.
The canyon does require some easy scrambling, and, often, some wading, however the lower reaches are worthwhile and you can, should, always turn around if you feel unsafe. Desert canyons can also change after any flood so don't make firm presumptions as to the difficulty of any hike before you begin.
Canyon hiking is usually not all that difficult, but it is a step harder than a typical mountain trail and educating yourself before doing any canyon and/or desert hikes is essential. This slot is usually always cool, but the short approach hike can get very hot, especially in summer.
The hike can be done as an out and back or as part of a 'lollipop' loop with Bell Canyon.
This is becoming a popular Four Corners destination and you may encounter individuals who are not comfortable with the minor wading and scrambling associated with this hike.