Sulphur Creek Hot Spring

Sulphur Creek Hot Spring is a documented thermal spring on Sulphur Creek, the 18-mile tributary that joins the Middle Fork of the Salmon River at Dagger Falls, deep inside the Frank Church River of No Return Wilderness. It exists in the federal record as an entry in the USGS thermal springs inventory, which plots it on the creek’s lower reach and classes it simply as hot: the inventory publishes no temperature for it, and no measured temperature has been found in any source since.

What the creek does have is a soaking history, and it belongs to the ranches. The lower valley holds two private inholdings, Sulphur Creek Ranch and Morgan Ranch, and Morgan Ranch’s own account documents a natural hot spring bathing pool, a hot spring shower, and floors heated by the spring water. That pool is for the ranch’s guests only. No public soak at the inventoried spring is documented anywhere, so treat this page as the record of a real wilderness spring on a famous creek, not as a destination to plan a soak around.

Soak Stats

Place Information

Location, Map & Directions

No road reaches Sulphur Creek. The creek runs east from the Cape Horn country to its confluence with the Middle Fork at Dagger Falls, just below the Boundary Creek put-in where most Middle Fork float trips start. From the river, the corridor is a permitted Middle Fork float; Dagger Falls and the creek mouth are passed in the trip’s first miles. From the west, wilderness trails reach the drainage from the Highway 21 and Landmark country: the Selway Bitterroot Frank Church Foundation’s trail project describes a roughly 20-mile loop skirting Sulphur Creek, Dagger Creek, and Boundary Creek, with trailheads about an hour and a half east of Cascade or north of Banner Summit. The ranches are reached the way everything in the Frank is reached: by trail, by river, or by air, landing on the ranches’ private strips by arrangement.

None of those routes is a route to a public soak. The inventoried spring plots on the creek’s lower reach, in the same stretch of valley as the ranch inholdings, and no source describes a trail to the vent or a pool the public may use. Travel the corridor for the corridor; the hot water documented on this creek is the ranches’ own.

One record-keeping note, because the name invites confusion: the federal inventory carries a second, entirely separate Sulphur Creek Hot Spring at 44.585, -115.072, on a different Sulphur Creek in the upper Middle Fork headwaters near the Seafoam country. Nothing is known about that spring beyond its inventory line, and nothing on this page describes it.

The Soaking Experience

The documented soak on Sulphur Creek is a private one. Morgan Ranch, the downstream of the creek’s two inholdings, is a private family home that takes one group of up to seven guests at a time, and its own site lists among its features “a natural hot spring bathing pool,” a separate cool spring-fed pool, and an outdoor hot spring shower it calls El Caracol. The main house floors are heated by the spring water itself, through a grid of iron pipe laid under the concrete when the house was built in the late 1940s. Guests reach the ranch by its private airfield or by trail and river, and the hot pool is simply part of the stay.

For anyone else, this listing will not describe a soak it cannot document. Whether the inventoried vent is the same water the ranch uses has never been published, and no public pool, riverside soaking spot, or trail-side tub on Sulphur Creek appears in any source consulted. If you are floating or walking the corridor, enjoy the creek as what it verifiably is: one of the Middle Fork’s great tributaries, with a hot spring in its federal record and a remarkable ranch history on its banks.

Fees, Hours & Reservations

There is no public fee, because there is no public soak. The Morgan Ranch stay is a private arrangement with published per-person overnight rates on the ranch’s site, meals included, for one group at a time in season (the ranch’s published opening is in late May). Sulphur Creek Ranch, the upstream inholding, runs a seasonal guest ranch, generally Memorial Day weekend through October, by reservation and fly-in. Floating the Middle Fork past the creek’s mouth requires a permit, administered through the Middle Fork Ranger District permit system. Wilderness regulations apply throughout the drainage.

Facilities, Lodging & Nearby

There is nothing at the spring itself. The creek’s human footprint is its two ranches: Sulphur Creek Ranch, a fly-in guest ranch with a lodge and eight cabins beside its private airstrip, and Morgan Ranch, the private home downstream with its lodge, guest house, and the hot spring pool described above. Both are inholdings surrounded by designated wilderness; respect their boundaries and their privacy. The nearest services are outside the wilderness entirely, back at Stanley and the Highway 21 corridor, or downriver with a float party’s own camp.

History

Sulphur Creek’s written history is a ranch history. In 1946 Dr. Ben Morgan, a Chicago anesthesiologist, flew in to look at a ranch for sale on the creek and bought it, building a dude ranch he called Sulphur Creek Ranch; the Morgans later bought the neighboring downstream property, first called Sulphur Creek Lower Ranch and finally Morgan Ranch, and built there too, heating the new house’s floors with the natural hot springs. Everything for both ranches came in by air and was freighted down the creek by wagon teams. The upstream property is still Sulphur Creek Ranch, a guest ranch managed by the Schroeder family since 2010; the downstream one is still the Morgan family’s home.

The spring itself enters the record the quieter way, through the federal thermal inventories, which carry it without a temperature, a use, or a description. The valley’s public story changed in 2012, when the Trust for Public Land purchased 80 acres of Morgan Ranch with Land and Water Conservation Fund money and the Forest Service added the parcel to the Frank Church Wilderness, protecting the creek’s salmon and steelhead habitat; the ranch home property remained private and still operates. The whole drainage sits inside the wilderness designated in 1980, one of the original eight Wild and Scenic river corridors’ home country.

Safety & Health

Remoteness is the safety story, as everywhere on the Middle Fork corridor. The spring is miles inside designated wilderness with no road, no services, and no guarantee of cell coverage, reached only by multi-day trail travel, a permitted float, or a private flight to a ranch strip. Sulphur Creek itself is cold, fast salmon water in runoff season, and its crossings and banks deserve the same respect as the river’s.

At the spring, the honest warning is that nobody has published anything: no temperature (an undiluted wilderness source can scald), no pool condition, no water quality data. The documented pool on the creek is a maintained ranch facility for its guests; the inventoried vent is untested water on an unmarked reach of creek, and should be treated that way if it is ever found.

Best Time to Visit

No season is documented for the spring. The corridor sets the calendar: the ranches open in late May and run through about October, Middle Fork floats follow the permitted season from late spring into fall, and the high trailheads are snow-free-months propositions. There is no published best time to soak, because there is no published public soak.

Nearby Hot Springs

The Middle Fork corridor holds two of Idaho’s classic wilderness soaks in the same float and trail country. Sheepeater Hot Springs, a terrace of pools above the river reached at about river mile 13, and Trail Flat Hot Springs, a riverside soak farther down the corridor, are both reached the way Sulphur Creek is, by trail or by permitted float, and unlike Sulphur Creek both are documented public soaks. More East-Central Idaho hot springs →