“…The availability and abundance of oxidants in hot springs are dependent on processes that take place deep in the subsurface, as well as those that take place near the surface of these springs. The current model for the development of hot springs in YNP begins with injection of magmatic gases into a deeply seated hydrothermal aquifer(s) hosting fluids that have previously undergone and will continue to undergo water‐rock reactions (Fournier, White, & Truesdell, ; Hurwitz & Lowenstern, ; Rye & Truesdell, ; Truesdell & Fournier, ; Truesdell, Nathenson, & Rye, ; White, Muffler, & Truesdell, ). As this hydrothermal water ascends and infiltrates through the crust, it is subsequently altered by processes such as water‐rock interaction, boiling, and mixing with near‐surface groundwater (Lowenstern, Bergfeld, Evans, & Hurwitz, ; Nordstrom, McCleskey, & Ball, ).…”