Where is Warm River, Idaho?

Warm River is in Fremont County, Idaho. Nearby towns include Ashton (7.1 mi), Drummond (8.1 mi), St. Anthony (21 mi).

What is the population of Warm River, Idaho?

Warm River has a population of about 1 (U.S. Census).

Eastern Idaho

Warm River, Idaho

Fremont County1 people

See Warm River on the map

Illustration

Got a great photo or video of this place? Get it featured here, with credit and a link to your page. Submit yours.

Send a photo of the week for Warm River →

1Population

About Warm River

Warm River is a city in Fremont County. The Census estimated 1 person here in 2024. It sits at about 5,600 feet, 31 miles northeast of Rexburg in a straight line.

Places listed for this area include Yellowstone National Park (Idaho portion) and Tule Lake.

Moving to Warm River

Start with homes, jobs and local services in and around Warm River.

Cost of living

Warm River is outside the Idaho metros with a 2024 federal price figure, so this uses the Idaho statewide level. A basket that costs $100 in the U.S. costs $95.49 here, under the U.S. average by 4.5%.

Open the calculator

Services for Warm River

All services

DMV counters are the county offices. A gas utility appears only when its public list names Warm River.

St. Anthony · Vehicles
146 N 2nd W St. Anthony, ID 83445
· Mon. - Fri. 8:00 AM - 4:00 PM
St. Anthony · Driver's licenses
146 N 2nd W St. Anthony, ID 83445
· Mon. - Fri. 8:00 AM - 4:45 PM

No natural gas utility on the official town lists names Warm River.

Allergy ratings in Warm River

What a typical year looks like: Low, Moderate or High for each pollen season, plus wildfire smoke. Typical, general guidance. It is not medical advice. Pollen and smoke change with the weather every year, and what bothers you depends on what you are allergic to. See an allergist for testing.

Wildfire smoke
Mostly July to September
Low
Rating: Low, on a scale of Low, Moderate, High. 2 days a year with air quality over 100. Worst year 9 (2021).

No pollen rating for Warm River. The nearest National Allergy Bureau counting station in Idaho data is Twin Falls, 191 miles away, which is farther than we borrow a rating from. Mountain valleys can differ a lot from the plains. Look up today's counts instead.

How these ratings are worked out

Pollen is rated on the National Allergy Bureau bands for the grains of pollen in a cubic meter of air. Trees: Low under 15, Moderate 15 to 89, High 90 to 1,499. Weeds: Low under 10, Moderate 10 to 49, High 50 to 499. Grass: Low under 5, Moderate 5 to 19, High 20 to 199. The band is the one reached on the busiest quarter of counted days. A rating is typical, not a forecast: one wet or windy year can move it.

Wildfire smoke, Low. The average number of days a year the EPA's air quality index passed 100 ("unhealthy for sensitive groups" or worse), 2021-2025. Under 3 days is Low, 3 to 9 Moderate, 10 or more High. That grouping is ours, not the EPA's. Fremont County has no EPA monitor, so this uses Bonneville County, 38 miles away. The count includes any cause, but across Idaho's monitors 86% of those days fell in July to September and 94% were fine particles (PM2.5), which is what wildfire smoke is made of (570 county-days, 2021-2025).

Not rated. Mold: no published mold spore counts for Idaho towns are in the data used, so there is no mold rating. House dust, pets and food allergies are outside this rating.

Sources

EPA AirData: annual AQI by county

Today

Pollen data through 2003-2024, smoke data 2021-2025. Checked 2026-10-03.

Map of Warm River

Parks, trails and things to do

All of Idaho

Places in and around Warm River, nearest first: everything tied to Warm River plus anything within 15 miles of town.

Things to do

Waterfalls

Lower Mesa Fallswaterfall
4.2 mi
Upper Mesa Fallswaterfall
5.0 mi
Sheep Fallswaterfall
12 mi

Lakes

Tule Lakelake
9.8 mi
Fish Pondlake
15 mi

Historic sites

Ashton-Tetonia Rail Trailhistoric site · near Drummond
7.3 mi

Parks

Yellowstone National Park (Idaho portion)national park site
18 mi

Trails

Greater Yellowstone - Teton Rail Trail4.7 mi long · near Ashton
4.3 mi
Mesa Nature Trail0.9 mi long
4.8 mi
National Forest Development Road 364 Trail4.1 mi long
6.5 mi
Sheep Falls Trail0.5 mi long
7.0 mi
Ashton to Tetonia Trail29.6 mi long · near Ashton
7.1 mi
National Forest Development Road 520 Trail0.5 mi long
7.1 mi
National Forest Development Road 247 Trail1.2 mi long
9.1 mi
Ashton-Tetonia Rail Trail29.6 mi long · near Drummond
11 mi
National Forest Development Road 513 Trail1.5 mi long
13 mi

Distances are straight-line miles. From state and federal agency pages, the USGS place names list and OpenStreetMap contributors. Checked October 2, 2026. Check the official page for hours, fees and closures before you go.