Little Wild Horse & Bell Canyons - 2A II-III - CLASSIC! No other way to say it! Absolute Classic! This is THE non-technical canyon loop of the San Rafael Swell! Go for it! Check out this video for the basics.
yourhikingguide.com writes: "Little Wild Horse Canyon is one of the most accessible and popular slot canyons in the San Rafael Reef, and the most frequently visited slot in the state of Utah. It is a suitable hike for all ages, and is typically the first slot canyon that beginners try. It is also a dog friendly hike, as I have seen dogs with their owners on each trip I’ve taken through Little Wild Horse Canyon. With tight narrows and serpentine twists, it is an awesome hike for all to enjoy."
As such...lets talk about the main difficulty below...
Be Kind (and a good representative of the FKT community) time fast efforts to avoid peak tourist times: Slot canyons are narrow (no duh) but that means there is not always space to pass. Many tourists and canyoneering enthusiasts like to enjoy canyons slowly, please be respectful of their experience. Choosing an early morning start or a just before sunset start time may be essential to not get stuck behind these groups. Its a win-win to avoid ruining your time and their experience by choosing a courteous start time. (a good indicator may be the number of unoccupied vehicles at the trailhead)
Have fun out there!