# Big Warm Springs, Utah

Big Warm Springs in Utah. 72°F (22°C). Roadside · Public Land. Tooele County.

- Page: https://www.soakingsprings.com/hot-springs/utah/big-warm-springs
- Source: Soaking Springs, researched and maintained by Armen Suny
- Updated: 2026-09-14

## Can you soak at Big Warm Springs?

The water leaves the ground at 72°F, about as warm as a heated pool. You can drive right up to it. We haven't confirmed whether it has a pool or charges a fee.

## Key facts

| Fact | Value |
|---|---|
| Source water temperature | 72°F (22°C) (USGS record; developed pools are often cooled) |
| pH | 7.7 (Slightly Alkaline) |
| Total dissolved solids | 8,110 mg/L |
| Elevation | 4,220 ft |
| Access | Roadside · Public Land, 238 ft from the nearest road |
| Land | State Trust Lands I-80 Block, SLB |
| County | Tooele County |
| Nearest town | Grantsville |
| Coordinates | 40.74300, -112.64200 |
| Best months to soak | January, December, February (largest gap between water and average air temperature) |
| Nearest campground | Lower Narrows Campground, 17.5 mi |

## About Big Warm Springs

Big Warm Springs is a state trust land spring in Tooele County, a dozen miles out of Grantsville, and the record marks it open. The water runs warm, well short of hot. What stands out is its salt: the 1966 sample shows a heavy load of dissolved solids, over eight thousand milligrams per liter, so expect brackish water.

The ground is state trust land in a block along Interstate 80, listed as an SRMA, a recreation management designation. You can pull over and walk a couple hundred feet. The valley floor sits a little over four thousand feet and gets real winter, twenty-some inches of snow most years, though the spring is close enough to the road that snow matters less here than at a trailhead. Lower Narrows Campground is the closest camping named, about 17 miles off.

Winter is the visiting season on record. Access is open, the pull-off is roadside, and there is no fee on file. Come knowing you will find warm salty water. The chemistry is from 1966, so conditions could have drifted since.

## Water chemistry

Lab sample from 1966-05-27 (Water Quality Portal).

| Measure | Value |
|---|---|
| pH | 7.7 |
| Total dissolved solids | 8,110 mg/L |
| Calcium | 140 mg/L |
| Magnesium | 85 mg/L |
| Sodium | 2,750 mg/L |
| Sulfate | 318 mg/L |
| Chloride | 4,420 mg/L |

## Nearby

- Nearest city page: [Hot springs near Grantsville](https://www.soakingsprings.com/hot-springs/near/utah/grantsville), 0 mi away
- State page: [Hot springs in Utah](https://www.soakingsprings.com/hot-springs/utah)
- [Utah Fish And Game Dept, UT](https://www.soakingsprings.com/hot-springs/utah/utah-fish-and-game-dept): 75°F source, Roadside, near Grantsville, Tooele County
- [Unnamed thermal spring, UT](https://www.soakingsprings.com/hot-springs/utah/unnamed-spring-tooele-county-1): 68°F source, Roadside, near Grantsville, Tooele County
- [Unnamed thermal spring, UT](https://www.soakingsprings.com/hot-springs/utah/unnamed-spring-tooele-county-2): 72°F source, Short Walk, near Grantsville, Tooele County
- [Grantsville Warm Springs, UT](https://www.soakingsprings.com/hot-springs/utah/grantsville-warm-springs): 77°F source, pH 7.5, TDS 26,700 mg/L, Roadside, near Grantsville, Tooele County
- [Horseshoe Springs, UT](https://www.soakingsprings.com/hot-springs/utah/horseshoe-springs): 73°F source, Roadside, near Grantsville, Tooele County
- [Deseret Livestock South Springs, UT](https://www.soakingsprings.com/hot-springs/utah/deseret-livestock-south-springs): 73°F source, Roadside, near Grantsville, Tooele County

## Questions

**What is the water temperature at Big Warm Springs?**
Big Warm Springs has a water temperature of 72°F (22°C). This is a warm thermal spring.

**Where is Big Warm Springs located?**
Big Warm Springs is located in Tooele County, Utah at 4,220 feet elevation, near Grantsville. Coordinates: 40.7430°N, 112.6420°W.

**How do I get to Big Warm Springs?**
Big Warm Springs has Roadside road access (238 ft from the road).

**Is Big Warm Springs free to visit?**
Big Warm Springs has Open access. It is managed by SLB.

**Can I camp near Big Warm Springs?**
Yes, Lower Narrows Campground is located nearby (17.5 miles away).

**What minerals are in the water at Big Warm Springs?**
Water chemistry analysis shows the presence of pH, Total Dissolved Solids, Calcium, Magnesium, Sodium, Sulfate, Chloride. The pH is 7.7 (slightly alkaline). Total dissolved solids measure 8,110 mg/L.

## Sources

- USGS thermal springs records, Water Quality Portal lab analyses, OpenStreetMap, Wikipedia/Wikidata, NOAA climate normals
- https://en.wikipedia.org/wiki/Slates_Hot_Springs