Unnamed Thermal Spring
This unnamed 81°F spring flows 24.7 degrees above the 56.3°F ambient temperature in Millard County near Delta, emerging at 4,430 feet on BLM land managed by the Fillmore Field Office. The spring lies 558 meters from the nearest road, requiring a short walk across open desert. Public access is open under standard BLM regulations.
The spring sits in the Sevier Desert, a vast basin receiving just 6.6 inches of annual precipitation and 17.9 inches of snow—among Utah's most arid climates. Vegetation is sparse: shadscale, pickleweed, and greasewood adapted to alkaline soils and limited moisture. The landscape is flat to gently rolling with playas and salt flats visible in multiple directions. Surrounding land is BLM rangeland with minimal human development.
No name has been assigned to this spring in historical records. The Sevier Desert was traversed by Goshute and Paiute peoples utilizing scattered water sources. The Old Spanish Trail crossed the region in the 19th century; Mormon settlers established Delta in 1906. This specific spring lacks documented development or historical notation.
Visit March through May or September through November to avoid summer heat (regularly exceeding 100°F) and occasional winter cold. Bring all water, food, and supplies; Delta is the nearest town. The 558-meter walk crosses open terrain with no shade. No developed facilities exist nearby. High-clearance vehicle recommended for approach.
Is this spring worth visiting?
Best for
- Warm-water soaking