This is a day trip entry.
For this hike, we went west of Green River, and then south along the east side of the San Rafael Swell, for a great day hike and outing. We hiked up Bell Canyon and down Little Wild Horse Canyon. In some places, the canyon was just a shoulder width pathway through towering sandstone. It was approximately 8 miles total hiking, and a loop trail (my favorite), rather than an out and back.
This would be a good hike anytime but summer, with the usual warnings about weather awareness. Though rare, it is subject to flash floods, and could be cold and uncomfortable, and slippery in too much ice or snow. Depending on current conditions, it is hikeable September through June, with July and August just too hot for most, and August is often prone to thunder storms.
We stopped at Ray's Tavern in Green River for dinner on the way home. They serve the best burgers in the world, and have Unita Microbrew.
If you want, you can camp either at the trail head or in Goblin Valley, or nearby in Capitol Reef National Park, but from Canyon Wren Farm, it is a great day trip...