Natural AttractionFort Yellowstone Overlook
Travertine terraces from Mammoth Hot Springs; calcium carbonate deposition in action.
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Porkchop Geyser
Last Updated: January 2026
Type
Thermal Feature
Accessibility
Drive-up view; boardwalk accessible with gentle inclines; some sections may be uneven
Best Season
Summer
Busiest Season
Summer
Features
Geyser vent, vent crater, steam plumes, boardwalk loop, acidic hot springs
Elevation
8,244 ft
Overview
About This Attraction
Steam threads the air above Porkchop Geyser as boardwalks loop around a vent and a crater rim. Mineral crust glints in pale light while heat radiates from the surface. This activity arises from a tectonic/volcanic hydrothermal system at Yellowstone's hotspot, where faulting funnels superheated water to the surface. Rocks up to 1.88 meters were hurled as far as 60 meters during the 1989 explosion.
Quick Facts
Type
Thermal Feature
Elevation
8,244 ft
Access
Drive-up view; boardwalk accessible with gentle inclines; some sections may be uneven
Main Features
Geyser vent, vent crater, steam plumes, boardwalk loop, acidic hot springs
What You'll See
A boardwalk loop around a steaming hydrothermal field; vents hiss and mineral crusts gleam; signs explain the processes; acidic waters and heat permeate the air
What Makes It Special
Notable for dramatic behavior shifts: explosion crater 10β14 m across; rocks up to 1.88 m hurled 60 m; eruptions rose from 6β9 m to 20β30 m just before 1989
Best Time to Visit
Summer (JuneβAugust) is optimal; roads are open and light is favorable. Mornings offer softer light for photography; avoid mid-day crowds.
Safety Considerations
Hydrothermal explosions are possible; water is near-boiling; stay on boardwalks; crust around vents is thin and can collapse; sturdy shoes required; bear spray recommended; cell service unreliable
Visitor Tips
- Stay on the boardwalk; ground around hot springs and vents is thin and scalding. Donβt step off marked paths. - Wear sturdy shoes to handle uneven boardwalk sections. - Carry bear spray and stay alert for wildlife in Norris Basin. - Cell service is limited hereβdownload maps or note your route before you go. - Thermal water can reach near-boiling temperatures; do not touch vent openings or any discolored areas.
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βΉοΈ Data Sources
montana.edu nps.gov geoscienceworld.org usgs.gov npshistory.com wikipedia.org eos.org whoi.edu quora.com Google Reviews National Park Service YourNPGuide Editorial
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