Thomas Creek Ranch Hot Spring

Documentation record: Thomas Creek Ranch Hot Spring has no documented pool and no verified public access information. This page records what the official geothermal registries say about the spring, and nothing beyond it.

Thomas Creek Ranch Hot Spring appears in the federal thermal springs list at 138 °F, on the Greyhound Ridge quadrangle, in the Thomas Creek drainage near the Middle Fork of the Salmon River in Custer County. The U.S. Geological Survey’s GEOTHERM file carries the same spring as record 0081109 in Township 16 North, Range 12 East, Section 17, at 59 °C, which is the same 138 °F.

A USGS water data site holds the spring’s entire observational record: one field visit, on June 27, 1980, the same day the survey party sampled Sunflower Flat Hot Spring, about a mile northwest. Three federal records, one spring, one section, one temperature. The state geothermal dataset does not carry the spring under its name at all, and no other source consulted adds a fact to the federal rows.

Read this page as a documentation record for a real, inventoried spring in wilderness ranch country, not as a destination guide. No pool, development, visit, or public access is documented anywhere for Thomas Creek Ranch Hot Spring, and no agency manages it as a recreation site.

The name is the most human thing in its file: it ties the vent to a ranch on Thomas Creek, in a reach of the Middle Fork where private ranch inholdings sit inside the designated wilderness, and then the record stops. At 138 °F the source water would be far too hot to soak in undiluted even if a pool existed, and nothing in any record suggests one was ever built for the public.

Soak Stats

Place Information

Location and Access

The spring’s registry points sit in the lower Thomas Creek drainage, where Thomas Creek meets the Middle Fork of the Salmon River, at about 4,400 feet. This is the Thomas Creek airstrip reach of the Middle Fork: a public backcountry airstrip, a river trail that parallels the Middle Fork for most of its length, assigned float camps, state-owned parcels, and private ranch inholdings with their own bridges, all within a few river miles inside the Frank Church River of No Return Wilderness.

Floaters pass through on permitted Middle Fork trips, and hikers walk the river trail past the mouth of Thomas Creek. All of that public movement runs along the river, and none of it is documented to reach this spring.

Beyond that, this listing deliberately does not go. No published route to the spring exists, no source describes a visit to it, and ownership of the ground the spring rises on is not confirmed in any source consulted. The coordinates are public record in the registries linked above, but a set of coordinates is not an invitation, and on land of unconfirmed ownership it is not permission. Anyone with a genuine reason to visit should establish land ownership and, if the land is private, get the landowner’s permission first.

Is There a Soak Here?

The honest answer is that no source describes one at this spring. No soaking guide covers it, and no trip report or photograph tied to this inventoried vent exists in any source consulted; the aggregator pages that carry its name repeat the registry row and nothing more. The springs people actually soak in near this reach are its neighbors, the Sunflower springs northwest and northeast, which river and pilot sources name directly.

Whether this vent still surfaces today is not verified anywhere: the whole observational record is the 1980 survey visit, made the same day as the Sunflower Flat sampling about a mile away. If a landowner confirmation, a county record, or a credible field report ever surfaces, this page will be updated.

History

There is no settler story this listing can tell, and it does not invent one. What the record holds is a name and a survey. The name, Thomas Creek Ranch, preserves the working landscape of the Thomas Creek mouth country as the survey era found it: a ranch drainage on a river that was, and remains, lined with homesteads and inholdings inside what became the Frank Church River of No Return Wilderness.

The survey is the late June 1980 swing through this reach, when a USGS party sampled this spring and Sunflower Flat on June 27 and Sunflower Hot Springs on June 28, and the registries that followed, the thermal springs list, the GEOTHERM file, and the water data site, have carried Thomas Creek Ranch under its ranch name ever since, with no qualifier and no second chapter. The state dataset, alone among the registries, dropped the name entirely. That is the whole documented history: a hot vent on a ranch creek, written down once, at 138 °F.

Nearby Hot Springs

The nearest soakable listing in this reach is its sibling record, Sunflower Flat Hot Spring, about 0.9 miles northwest: a cooler spring at a public Forest Service float camp, and the contrast is the point, since that camp spring is a documented public soak and this one is not

The nearest full listing in the corridor is Pistol Creek Hot Springs, about 10 straight-line miles west, another Middle Fork record reached by trail or permitted float. No soakable spring is documented at Thomas Creek itself; this reach’s public soaks are the river corridor’s float stops, and this listing is honest about that rather than dressing a registry row up as one of them. More East-Central Idaho hot springs →