Sightseeing

Dragons Mouth Spring

📍 Wyoming · USA

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3.5/ 5.0

★★★★☆

Quick Facts

Location: USA, Wyoming
Category: Sightseeing
Opening Hours: Roads open May to October; summer is best
Ticket Price: $35 per vehicle for 7 days Yellowstone pass
Coordinates: 44.7489, -110.3039

Introduction

Dragons Mouth Spring in Yellowstone's Lower Geyser Basin is one of the park's most dramatic geothermal features. This acidic hot spring constantly belches roiling hot water and dense steam from a cave-like rock opening with a low roar, like a hidden dragon breathing in anger. Rich in sulfides, the water is a murky gray-green, and the vapor carries a strong sulfur smell that adds to the primordial mystique. Near boiling temperature, the plume condenses into a towering steam column in cold weather, visible hundreds of meters away. The boardwalk lets you feel its full sonic and visual force up close, one of the most sensorily striking stops in Yellowstone's geothermal tour.

✨ Highlights

Dragon's Roar

Water surging from a cave-like opening makes a continuous low roar, Yellowstone's most sonically striking feature.

Cave-like Vent

Acid has eroded an arching cave in the rock; hot mist boils out like a dragon's open jaw.

Steam Column

In cold weather the plume condenses into a tall steam pillar, visible from afar like a subterranean beast exhaling.

Sulfur Atmosphere

Strong sulfur smell and rolling gray-green mist create a primordial underworld mood.

Lower Geyser Basin

Located in the famous Lower Geyser Basin, combine with Fountain Paint Pot and Grand Geyser.

Acidophile Microbes

The hot acidic environment hosts unique thermophilic acidophiles, a key site for extreme-life research.

🛈 Practical Info

→Best Time：June to September; cold seasons show taller steam but roads may close

→Transport：In Lower Geyser Basin, drive along Firehole Lake Drive

→Duration：About 30 minutes

→Accessibility：Boardwalk is wheelchair accessible

→Opening Hours：Roads open May to October; summer is best

→Ticket Information：$35 per vehicle for 7 days Yellowstone pass

💡 Tips

• The crust is thin and water near boiling; leaving the boardwalk is deadly, watch children closely.

• Sulfur is strong; sensitive visitors can take a quick photo and move on without lingering.

• Same area as Grand Geyser and Fountain Paint Pot; plan an hour for Lower Geyser Basin highlights.

• In cold weather the steam column is taller if roads are open; check road status first.

FAQ

What are the opening hours of Dragons Mouth Spring?

Roads open May to October; summer is best

How much is the admission for Dragons Mouth Spring?

$35 per vehicle for 7 days Yellowstone pass

Any practical tips for visiting Dragons Mouth Spring?

The crust is thin and water near boiling; leaving the boardwalk is deadly, watch children closely. Sulfur is strong; sensitive visitors can take a quick photo and move on without lingering.