Porkchop Geyser
Informational sign for Porkchop Geyser in Yellowstone National Park, with steam rising from a geyser beside a forested boardwalk.
Signboard at Porkchop Geyser in Yellowstone National Park shows a large steam plume erupting from a barren area with a forest behind.
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Porkchop Geyser

Natural Attr★★★★☆
Last Updated: January 2026

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.

Best Time to Visit

Summer (June–August) is optimal; roads are open and light is favorable. Mornings offer softer light for photography; avoid mid-day crowds.

Visitor Tips

- Stay on the boardwalk; ground around hot springs and vents is thin and scalding. Don’t 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 here—download maps or note your route before you go. - Thermal water can reach near-boiling temperatures; do not touch vent openings or any discolored areas.

ℹ️ 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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