Trail · Utah
The one trail in Zion open to dogs, on a leash no longer than 6ft (retractables locked at 6ft). Every other trail, the wilderness and the shuttle buses are off limits.
A paved path along the Virgin River from the Zion Canyon Visitor Center, under the canyon walls.
The policy above is the standing rule of the agency that manages this land, as published on its own pages. Official page.
Rules change, and seasonal beach rules change twice a year. Check before a long drive.