Skull Arch

Overview

Skull Arch is an imposing double arch perched high above a shaded canyon floor inside the Fiery Furnace—a labyrinth of narrow sandstone fins that feels more like a natural playground than a typical trail. It’s one of the Fiery Furnace’s headline features, dramatic even by Arches standards.

What Makes It Special

The setting is the star. The fins funnel you through cool, dim corridors before the canyon opens and the arch appears overhead. Along the way you’ll weave between sculpted walls, catch occasional glimpses of the La Sal Mountains, and pass other curiosities like Surprise Arch and quirky rock shapes.

The Experience

Expect a short-but-spicy outing: roughly 1.9 miles round trip with about 300 feet of elevation gain, plus a spur to the arch. There are few (if any) markers, so you’ll rely on observation and memory. Light scrambling and agility are part of the fun. Many visitors see Skull Arch on a ranger-guided Fiery Furnace tour, while others go with a permit for self-guided exploration.

Permits, Rules, and Protection

The Fiery Furnace is permit-only to protect its fragile environment. Before you get your permit, you’ll complete a required orientation (often a film) that covers route-finding, safety, and how to avoid damaging cryptobiotic soil. Stick to durable surfaces and be thoughtful with footsteps—your choices matter here.

Geology in Brief

These fins and arches are Entrada Sandstone, carved by eons of wind and water. Vertical cracks widened into fins, and where undercutting and collapse aligned just right, arches formed. Skull Arch’s lofty twin openings make it a standout example.

Wildlife

This high-desert pocket can reward patient eyes with lizards, ravens, canyon wrens, and small mammals. Dawn and dusk are your best bets—midday heat sends most life into the shade.

Best Time to Visit

• Early morning: coolest temps, softer light in the corridors, and the calmest vibe.
• Weekdays: generally quieter. Permit limits keep crowds down, but it still feels more peaceful midweek.
• Summer afternoons can be toasty; the shade helps, but you’ll still feel the heat.

Know Before You Go

Bring plenty of water (none on route), snacks, sun protection, and a reliable sense of direction—maps or GPS can help, but paying attention to landmarks is key. If navigation isn’t your thing, book the ranger-guided tour and just enjoy the adventure.