Zion 2026 Large Vehicle Rules

Above, the east entrance into the Zion-Mount Carmel Tunnel. Photo by Armand Vaquer.

The last time I drove into Zion National Park was in 2015. My daughter and I took a trip to Yellowstone National Park and on the way home we took a detour and drove into Zion.

We took SR-9 through the Zion-Mount Carmel Tunnel.

Zion National Park is implementing new large vehicle size restrictions not only for the tunnel, but for the road itself. RVers should be aware of this.

RV Life posted an article on these restrictions and begin it with:

Heading to Zion National Park this summer? If you are planning to drive a motorhome, tow a trailer, or travel in a larger vehicle, here is what you need to know.

Beginning June 7, 2026, Zion National Park will fully enforce vehicle size and weight limits on the Zion-Mount Carmel Highway (Utah State Route 9) between Canyon Junction and the East Entrance. Vehicles that exceed the posted limits will no longer be allowed to travel this section of SR-9.

These restrictions apply to the entire stretch of highway between Canyon Junction and the East Entrance, not just the historic 1.1-mile-long Zion-Mount Carmel Tunnel.

To read more, go here.