# Hot Spring On Umnak Island, Alaska

Hot Spring On Umnak Island in Alaska. 149°F (65°C). Backcountry. Aleutians West Census Area County.

- Page: https://www.soakingsprings.com/hot-springs/alaska/hot-spring-on-umnak-island
- Source: Soaking Springs, researched and maintained by Armen Suny
- Updated: 2026-09-14

## Can you soak at Hot Spring On Umnak Island?

Not at the source. The water leaves the ground at 149°F, hot enough to burn skin. It sits deep in the backcountry.

## Key facts

| Fact | Value |
|---|---|
| Source water temperature | 149°F (65°C) (USGS record; developed pools are often cooled) |
| Total dissolved solids | 2,652 mg/L |
| Elevation | 100 ft |
| Access | Backcountry, 29.0 mi from the nearest road (Beachmaster Street) |
| County | Aleutians West Census Area County |
| Nearest town | Unalaska |
| Coordinates | 53.23300, -168.30000 |
| Best months to soak | January, February, March (largest gap between water and average air temperature) |

## Soaking safety

**Very Hot Source, Use Extreme Caution.** At 149°F, the source water at Hot Spring On Umnak Island is hot enough to cause burns. Some hot springs this hot have cooler side pools or downstream areas suitable for soaking. Always test the water temperature before entering.

## About Hot Spring On Umnak Island

A scalding, heavily mineralized spring on Umnak Island in the Aleutians West Census Area. Unalaska is the nearest town, roughly eighty-five miles away. The water comes out too hot to touch, and it carries a heavy load of dissolved solids. No access status or land owner is in the record.

Low on the island, a hundred feet up, nearly thirty miles from the nearest road, which the record names as Beachmaster Street. Past that, no route. Aleutian weather, cool and wet, with snow in winter and rain in between. No land unit is attached. Nothing is said about a cabin or a campground.

USGS lists a sampling site here. The 1976 analysis measured high dissolved solids with iron present.

The climate data calls January through March the best months. Scalding at the source; this is a spring to step into only after finding cooler water and checking it. Access is not on record and neither is ownership, so find out who controls the ground. Chemistry is from 1976.

## Water chemistry

Lab sample from 1976-07-15 (Water Quality Portal).

| Measure | Value |
|---|---|
| Total dissolved solids | 2,652 mg/L |
| Calcium | 180 mg/L |
| Magnesium | 1.5 mg/L |
| Sodium | 650 mg/L |
| Sulfate | 88 mg/L |
| Chloride | 1,300 mg/L |
| Iron | 40 µg/L |

## Nearby

- Nearest city page: [Hot springs near Unalaska](https://www.soakingsprings.com/hot-springs/near/alaska/unalaska), 0 mi away
- State page: [Hot springs in Alaska](https://www.soakingsprings.com/hot-springs/alaska)
- [Hot Springs Near Hot Springs Cove, AK](https://www.soakingsprings.com/hot-springs/alaska/hot-springs-near-hot-springs-cove-1): 192°F source, TDS 2,652 mg/L, Backcountry, near Unalaska, Aleutians West Census Area County
- [Hot Springs Near Hot Springs Cove, AK](https://www.soakingsprings.com/hot-springs/alaska/hot-springs-near-hot-springs-cove-2): 158°F source, TDS 2,652 mg/L, Backcountry, near Unalaska, Aleutians West Census Area County
- [Hot Springs Near Geyser Bight, AK](https://www.soakingsprings.com/hot-springs/alaska/hot-springs-near-geyser-bight-2): Hot, Backcountry, near Unalaska, Aleutians West Census Area County
- [Hot Springs Near Geyser Bight, AK](https://www.soakingsprings.com/hot-springs/alaska/hot-springs-near-geyser-bight-1): 216°F source, Backcountry, near Unalaska, Aleutians West Census Area County
- [Hot Springs Near Geyser Bight, AK](https://www.soakingsprings.com/hot-springs/alaska/hot-springs-near-geyser-bight-3): 214°F source, Backcountry, near Dutch Harbor, Aleutians West Census Area County
- [Thermal Springs In Okmok Caldera, AK](https://www.soakingsprings.com/hot-springs/alaska/thermal-springs-in-okmok-caldera): Backcountry, near Dutch Harbor, Aleutians West Census Area County

## Questions

**What is the water temperature at Hot Spring On Umnak Island?**
Hot Spring On Umnak Island has a water temperature of 149°F (65°C). This is considered a hot spring, well above body temperature.

**Where is Hot Spring On Umnak Island located?**
Hot Spring On Umnak Island is located in Aleutians West Census Area, Alaska at 100 feet elevation, near Unalaska. Coordinates: 53.2330°N, 168.3000°W.

**How do I get to Hot Spring On Umnak Island?**
Hot Spring On Umnak Island has Backcountry road access, with the nearest road being Beachmaster Street (29.0 mi from the road).

**What minerals are in the water at Hot Spring On Umnak Island?**
Water chemistry analysis shows the presence of Total Dissolved Solids, Calcium, Magnesium, Sodium, Sulfate, Chloride, Iron. Total dissolved solids measure 2,652 mg/L.

**Is it safe to soak at Hot Spring On Umnak Island?**
No, not at the source. The water at Hot Spring On Umnak Island reaches 149°F, which can cause severe burns within seconds. Look for cooled side pools or downstream stretches, and test with a hand before anything else.

## Sources

- USGS thermal springs records, Water Quality Portal lab analyses, OpenStreetMap, Wikipedia/Wikidata, NOAA climate normals