Zion – Mount Carmel Highway
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Road TripScenic LookoutCanyonGeologyPhoto SpotMust-See
Overview
Completed in 1930 to connect Zion with the Grand Canyon, the Zion-Mount Carmel Highway is a magnificent twenty-five-mile engineering masterpiece that snakes beautifully through towering cross-bedded sandstone cliffs. The absolute centerpiece of this scenic highway is the historic Zion-Mount Carmel Tunnel, a monumental 1.1-mile structure blasted directly through the solid rock face, featuring massive rock windows that look out over the canyon. Driving this route takes travelers through switchbacks, pastel-colored slickrock landscapes, and dramatic geological transitions that represent the peak of civil engineering.
Practical Info
Suggested Duration1-2 hours
Best TimeThis 25-mile monumental engineering mountain highway is spectacular from May to October. The definitive hour of day for a road trip is late afternoon from 3:30 PM to sunset; when driving the legendary 1.1-mile historical Mount Carmel Tunnel—carved deeply inside solid sandstone cliff walls with massive arched windows overlooking the deep gorge—the low evening sun washes the Checkerboard Mesa in gold rays.
Getting ThereAn active, toll-paid federal scenic parkway stretching 25 miles along State Route UT-9 from the South Entrance at Springdale to the East Entrance at US-89. Private vehicle driving is the only method; standard park entry fees ($35 or America the Beautiful Pass) apply at the gatehouses. Note: Oversized camper vans or multi-axle RVs must purchase a $15 Tunnel Permit online to receive ranger escort single convoy flows.
Travel Tips
- Mandatory Oversized RV Tunnel Escort Permits Upcharge: Vehicles exceeding 7'10" in width or 11'4" in height (including Class-A/C motorhomes and travel trailers) must purchase a $15 Tunnel Escort Permit at the park gate. Rangers will checkpoint and close oncoming traffic to allow center-line driving.
- Strict Hourly Curfews for RV Tunnel Passage: Ranger-controlled single-lane escorts for oversized rigs do not run 24/7; summer hours are typically 8 AM to 8 PM, shrinking drastically in winter. Arriving post-curfew means the tunnel is locked to large vehicles, forcing a grueling 2-hour detour.
- Steep Continuous 180-Degree Switchbacks & Low Gear Warning: The road drops via six sharp, exposed mountain switchbacks lacking continuous dividers. To prevent total brake fade or pad smoke failure, drivers must shift into low gear (L/M gear) to utilize engine braking for downhill speed controls.
Reviews
Positive
- Driving the mountain switchbacks and piercing the historic 1.1-mile rock tunnel reveals scenic striped cliffs rolling past; an incomparable vista.
- A vital transit link bridging Zion, Bryce, and the Grand Canyon; the pavement is flawlessly smooth, costing zero extra fees for grand, authentic value.
- Features multiple safe roadside pullouts and scenic picnic turnouts, backed by highly rigorous safety management and multilingual warning indicators.
- Cruising between the thousand-foot cliffs during the off-season offers minimal traffic, letting you quietly enjoy pristine western natural serenity.
Heads up
- Because the historic 1.1-mile tunnel is narrow and low, oversized RVs or buses must pay mandatory escort fees at control points, a tedious extra spending.
- Peak hours trigger one-way alternating traffic control at tunnel gates, creating kilometers of gridlock that drains travel patience and transport ease.
- Tiny scenic pullouts fill completely by noon, causing careless drivers to double-park on the asphalt due to a lack of live traffic enforcement staff.
- Dozens of miles of high cliffside highway feature zero modern restrooms, zero water, and zero gas; breakdowns face an absolute loss of cell signals.