Liberty Cap: 11 m Travertine Hot Spring Cone at Mammoth Hot Springs, Yellowstone National Park

+2 more

Type

Geological Formation

Accessibility

Drive-up view; boardwalks with wheelchair-accessible sections; some transitions to stairs may require assistance.

Best Season

Spring and Fall

Busiest Season

Afternoons during summer

Features

Travertine cone; Lower Terraces boardwalk; Palette Spring

Overview

About This Attraction

A white travertine cone rises 37 feet above the Lower Terraces, its mineral crust catching light as water once pushed calcium carbonate into a towering mound. This growth marks about 2,500 years of deposition from a spring that stayed active in one spot, building the cone over centuries. It stands as a tangible record of Yellowstone's shifting geothermal system.

Quick Facts

Type

Geological Formation

Access

Drive-up view; boardwalks with wheelchair-accessible sections; some transitions to stairs may require assistance.

Main Features

Travertine cone; Lower Terraces boardwalk; Palette Spring

What You'll See

A 37-foot white travertine cone, steam and mineral crusts, active thermal terraces nearby, and a network of boardwalks through the Lower Terraces.

What Makes It Special

Remnant of an active hydrothermal feature; named by the Hayden Survey in 1871 after the Liberty Cap worn in the French Revolution; 11 meters tall with base dimensions comparable to its height.

Best Time to Visit

Spring melt in May and fall sunrise offer the best light for Liberty Cap; midday glare and crowds peak in summer.

Safety Considerations

Thermal burns risk; stay on boardwalks; boardwalks wet and slippery; fragile thermal crusts can crumble; wildlife at a distance; follow park safety rules; traction cleats in winter.

Visitor Tips

Stay on boardwalks; thermal crusts are fragile.
Wear traction cleats in winter; boardwalks can be icy.
Bear spray is commonly recommended in Yellowstone; keep distance from wildlife.
Arrive early to beat crowds; parking near Liberty Cap can fill by afternoon.
Use interpretive signs to understand travertine growth patterns.

Details

Location & Features

Type: Geological Formation

Distance from Entrance: Drive-up access; boardwalk distance ~135 yards (123 m) from Liberty Cap parking to Palette Spring; entire Lower Terraces loop ~1 hour.

What Makes It Unique:

Remnant of an active hydrothermal feature; named by the Hayden Survey in 1871 after the Liberty Cap worn in the French Revolution; 11 meters tall with base dimensions comparable to its height.

Geology

Formation Type: Travertine cone

Scientific Interest:

Visible travertine deposition within Yellowstone's hydrothermal plumbing; a 2,500-year record of mineral growth tied to geothermal heat flow from the caldera region

Getting There

Directions:

From Yellowstone's main roads, drive to Mammoth Hot Springs; park near Liberty Cap, then follow the boardwalk toward Palette Spring. Liberty Cap is visible along the Lower Terraces boardwalk.

Access Type: Drive-up view; boardwalks with wheelchair-accessible sections; some transitions to stairs may require assistance.

Road: Paved

Seasonal Access: Seasonal access: Drive-up viewing is available most of the year, but winter snow and ice can limit access; May snowmelt improves visibility and approach conditions; fall mornings provide sunrise light; afternoons tend to be crowded.

Parking: Parking near Liberty Cap; can be crowded in the afternoon.

Entry Fees: Varies

Trails

Trailheads Here:

Liberty Cap boardwalk from the Liberty Cap parking area; access to Palette Spring and Lower Terraces

Connecting Trails:

Rim trails and loop segments along the canyon edge

Photography & Viewing

Best Viewpoints:

From the Lower Terraces boardwalk near Liberty Cap; lookouts along the loop for varied geological angles.

Photo Opportunities:

Golden hour over Liberty Cap; side-light on travertine surfaces; steam plumes in cool air.

Best Photo Spots:

Boardwalk overlooks; Palette Spring vantage; sunrise-forward angles along the Lower Terraces

Sunrise/Sunset: Golden hour enhances the travertine's pale tones; alpenglow possible on clear mornings

Stargazing: Excellent

Facilities

Visitor Center
Restrooms (Flush)
Interpretive Signs

Cell Service: Cell service: Limited and inconsistent in the Mammoth Hot Springs area; plan ahead with offline maps.

Wildlife & Nature

Common Wildlife:

Elk

Best Wildlife Viewing: Dawn and dusk

Fall Colors Peak: Late September to early October

Seasonal Information

Best Season: Spring and Fall

Best Times: May (snowmelt) and fall (sunrise) for light and fewer crowds

Busiest: Afternoons during summer

Parking Fills: Afternoons in peak season; parking areas fill by afternoon

Winter Access: Winter access exists with conditions; traction required; some sections may be closed during severe weather

Weather:

Variable; spring melt and summer warmth with possible afternoon showers

Nearby

Nearby Attractions:

Palette Spring; Lower Terraces; Mammoth Hot Springs area

Nearby Services:

Restrooms near Mammoth Hot Springs; interpretive signs; parking areas nearby

Insider Tips

Capture early light when steam rises off the cone.
Look for the layered mineral growth on the cone itself.
Park early to secure a space near Liberty Cap.
The cone is a fossil of past hydrothermal activity—a geology lesson in stone.

Visitor Information

Accessibility:

Boardwalks with some wheelchair-accessible sections; steep grades in transitions; plan for assistance as needed

Family Friendly:

Explain the heat risk; keep children away from boardwalk edges; hold hands near drops

Nearby Facilities:

Restrooms near Mammoth Hot Springs; interpretive signs; parking areas nearby

Reviews

★★★★☆

4.7 /5

Based on 812 Google reviews

Based on 812 guest reviews

" Visitors rate Liberty Cap for the clear example of travertine growth and the boardwalk that circles the base. Interpretive signs help explain the depositional process and Yellowstone's geothermal history."

Reviews from Google

I promised myself I wasn't going to make a joke... But it's really HARD not to 😂Ok but seriously, this is an incredibly cool feature and definitely not one you're going to miss if you are in Mammoth. Not observably active at the moment, but you never know what's coming next at Yellowstone.

Beautiful geological formations. Plenty of signage to explain what you're seeing. Ample parking (though I came in the winter off season, so might not be ample parking in the summer/peak season.)

This is just one of many places to see in Mammoth. Really interesting.

Showing 3 of 812 reviews

FAQs

Do I really need to arrive before 7am to get parking?

Yes. Parking near Liberty Cap can fill by the afternoon, especially in peak season; arriving early yields easier access and shorter waits.

Is it worth the 135-yard boardwalk to see Liberty Cap?

Can I bring kids or an elderly relative to Liberty Cap?

Is the water or cone safe to touch?

What should I expect for wildlife while viewing Liberty Cap?

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Liberty Cap

Type

Accessibility

Best Season

Busiest Season

Features

Overview

About This Attraction

Quick Facts

Main Features

What You'll See

What Makes It Special

Best Time to Visit

Safety Considerations

Visitor Tips

Details

Location & Features

Geology

Getting There

Trails

Photography & Viewing

Facilities

Wildlife & Nature

Seasonal Information

Nearby

Insider Tips

Visitor Information

Location

Address & Directions

Proximity

Reviews

The YNPG Verdict

Reviews from Google

FAQs

Liberty Cap

Type

Accessibility

Best Season

Busiest Season

Features

Overview

About This Attraction

Quick Facts

Main Features

What You'll See

What Makes It Special

Best Time to Visit

Safety Considerations

Visitor Tips

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