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2012 Map of Lower Geyser Basin

Name: 2012 Topographic Map of Lower Geyser Basin
Creator: U.S. Geological Survey
Published: 2012
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2012

About this map

Firehole River carves through this thermal landscape, where the Lower Geyser Basin and Midway Geyser Basin showcase a dense concentration of hydrothermal features. The map illustrates a complex network of springs and geysers, from the thermal waters of Queens Laundry in Sentinel Meadows to the secluded Fountain Patrol Cabin near the Nez Perce Cr confluence. Geologic formations like the Porcupine Hills and Midway Bluff rise above the steaming basins.

Infrastructure is limited to specialized access points like Fountain Flat Dr and Firehole Lake Dr, which navigate the delicate terrain. The waterway network is intricate, featuring the Cascades of the Firehole and numerous smaller tributaries such as Fairy Cr and Tangled Cr that feed into the main river system, supporting a unique ecosystem defined by high-temperature springs like Flat Cone Spring and Bath Spring.