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Travel Guide

Conditions: weather, snow, rivers, roads & webcams

Today's forecast for Island Park and Yellowstone, and where to check the roads.

Conditions now

Weather forecast

Harriman State Park

Temperature
39°F
Conditions
Areas Of Fog
  • Today High 50° Low 22° Areas Of Fog then Partly Sunny
  • Thursday High 42° Low 24° Areas Of Fog then Mostly Cloudy
  • Friday High 39° Low 21° Partly Sunny

From the National Weather Service, updated 10:56 am.

Snow

Island Park, 6,300 ft, 7.7 mi away

Snow depth
0 in
Change in 24 hours
0 in
Change in 7 days
0 in
Snow water equivalent
0 in
Snow water equivalent, % of median
0%

From the USDA NRCS SNOTEL, updated 9:53 am.

Rivers

Henrys Fork near Island Park, ID, 7.3 mi away

Flow
84 cfs
Change in 24 hours
0 cfs

From the U.S. Geological Survey, updated 11:57 am.

National park alerts and road events

Yellowstone National Park

Yellowstone alerts (3)

Park-wide, from the National Park Service. All current conditions at nps.gov

  • Most Park Roads Closed to All Vehicles (Park Closure): Most roads are closed to prepare for commercially-guided snowcoach and snowmobile travel during the winter season, which will begin December 15 (weather depending). The road between the North and Northeast entrances i…
  • Biscuit Basin Closed Due to Hydrothermal Explosion (Park Closure): The parking lot, boardwalk, and Firehole River at Biscuit Basin, located north of Old Faithful, is closed to all travel until further notice due to the possibility of another event at the site of a hydrothermal explos…
  • Traffic Delays - Gardner River High Bridge (Information): Expect a single lane of traffic with up to 15-minute delays, 24 hours a day, seven days a week, from April 1 through November 24, 2026. Oversized/overweight vehicles (8'6"+ wide, 75'+ long, 80,000 lbs+ gross vehicle w…

From the National Park Service, updated 11:57 am.

Roads and passes

Mountain passes
  • Targee Pass: Dry, Array, Array · US 20 · 7,077 ft
  • Reynolds Pass: Dry, Array, Array · SH 87 · 6,836 ft
Road conditions
  • Fall Riv Br/Chick Creek from MP 354 to MP 385: Dry, Array, Array
  • Chick Creek/Montana Line (Targee Pass) from MP 385 to MP 406: Dry, Array, Array
  • Ahston/Warm River from MP 0 to MP 12: Dry, Array, Array
  • Teton Co Line/Ashton from MP 8 to MP 28: Dry, Array, Array
  • Henry’s Lake/Montana Line (Raynolds Pass) from MP 0 to MP 9: Dry, Array, Array
  • Sugar City/Fall Riv. Br (Chester) from MP 334 to MP 354: Dry, Array, Array

From the Idaho Transportation Department / 511, updated 11:57 am.

Highway cameras

Webcam: US-20 Osborne Bridge
US-20 Osborne Bridge, taken Nov 4, 11:57 am
Webcam: US-20 Sheep Falls
US-20 Sheep Falls, taken Nov 4, 11:57 am
Webcam: US-20 Ashton
US-20 Ashton, taken Nov 4, 11:57 am
Webcam: US-20 Henrys Lake
US-20 Henrys Lake, taken Nov 4, 11:57 am

From the Idaho Transportation Department / 511, updated 11:57 am.

West Entrance

Weather forecast

West Entrance

Temperature
34°F
Conditions
Mostly Cloudy
  • Today High 50° Low 20° Partly Sunny
  • Thursday High 41° Low 22° Mostly Cloudy then Slight Chance Light Snow
  • Friday High 39° Low 19° Partly Sunny

From the National Weather Service, updated 10:56 am.

Snow

West Yellowstone, 6,680 ft, 0.3 mi away

Snow depth
0 in
Change in 24 hours
0 in
Change in 7 days
0 in
Snow water equivalent
0.2 in
Snow water equivalent, % of median
200%
Snow depth, last 30 days (top of chart: 1 in)

From the USDA NRCS SNOTEL, updated 9:53 am.

Rivers

Madison River near West Yellowstone, MT, 1.4 mi away

Flow
322 cfs
Change in 24 hours
-13 cfs
Water temperature
47°F

From the U.S. Geological Survey, updated 11:57 am.

Old Faithful & the Upper Geyser Basin

Weather forecast

Old Faithful & the Upper Geyser Basin

Temperature
36°F
Conditions
Mostly Cloudy
  • Today High 50° Low 21° Mostly Sunny
  • Thursday High 42° Low 23° Partly Sunny
  • Friday High 39° Low 21° Mostly Sunny

From the National Weather Service, updated 10:56 am.

Rivers

Firehole River at Old Faithful, YNP, 0.3 mi away

Flow
44 cfs
Change in 24 hours
-1 cfs
Water temperature
44°F

From the U.S. Geological Survey, updated 11:57 am.

Roads & passes

Mountain passes
  • Targee Pass: Dry, Array, Array · US 20 · 7,077 ft
  • Reynolds Pass: Dry, Array, Array · SH 87 · 6,836 ft
Road conditions
  • Fall Riv Br/Chick Creek from MP 354 to MP 385: Dry, Array, Array
  • Chick Creek/Montana Line (Targee Pass) from MP 385 to MP 406: Dry, Array, Array
  • Ahston/Warm River from MP 0 to MP 12: Dry, Array, Array
  • Teton Co Line/Ashton from MP 8 to MP 28: Dry, Array, Array
  • Henry’s Lake/Montana Line (Raynolds Pass) from MP 0 to MP 9: Dry, Array, Array
  • Sugar City/Fall Riv. Br (Chester) from MP 334 to MP 354: Dry, Array, Array

From the Idaho Transportation Department / 511, updated 11:57 am.

Road conditions

Highway cameras

Webcam: US-20 Osborne Bridge
US-20 Osborne Bridge, taken Nov 4, 11:57 am
Webcam: US-20 Sheep Falls
US-20 Sheep Falls, taken Nov 4, 11:57 am
Webcam: US-20 Ashton
US-20 Ashton, taken Nov 4, 11:57 am
Webcam: US-20 Henrys Lake
US-20 Henrys Lake, taken Nov 4, 11:57 am

From the Idaho Transportation Department / 511, updated 11:57 am.

Yellowstone webcams

West Entrance

Webcam: West Entrance - Out of the Park
West Entrance - Out of the Park, taken Nov 4, 11:57 am
Webcam: West Entrance - Into the Park
West Entrance - Into the Park, taken Nov 4, 11:57 am

From the National Park Service, updated 11:57 am.

Grand Canyon of the Yellowstone

Webcam: Mount Washburn - Northeastern View
Mount Washburn - Northeastern View, taken Nov 4, 11:56 am
Webcam: Mount Washburn - Southern View
Mount Washburn - Southern View, taken Nov 4, 11:56 am

From the National Park Service, updated 11:57 am.

What to realistically expect

Henry's Lake
  • Rapid weather changes are normal. Cool mornings, warm afternoons, sudden showers or thunderstorms, colder air higher up and wind in the open valleys, all in one day. Forecasts help but are not always precise in the mountains.
  • Cold mornings, even in summer. Layers are the most reliable strategy all year.
  • Road delays from wildlife crossings, construction, wet or slick pavement, and frost or snow outside the peak of summer. Travel times often run longer than the map says.
  • Spring and fall bring mixed conditions: occasional snow or ice, low visibility and soft shoulders. Winter is far more demanding.

Winter driving

Snow tires and four-wheel drive are recommended in eastern Idaho in winter. Roads can change quickly, and even busy highways sometimes close for blizzards or high winds. Check 511 before you set out, and carry emergency gear: a shovel, water, snacks and blankets.

Backcountry safety

If you ski, snowmobile or hike into the backcountry, take survival gear and avalanche equipment, check the avalanche forecast from the Gallatin National Forest Avalanche Center, and do not rely on a phone or GPS alone. Most of all, tell someone where you are going and when you will be back.

Maps

The travel guide map shows the places in this guide, and the National Park Service has official Yellowstone maps. Live webcams are above.

Weather & road questions

Are Yellowstone roads open year-round?
No. Most interior roads close to wheeled vehicles from early November through late April. The North Entrance road between Gardiner and Cooke City is the only route open year-round for regular vehicles.
What should I know about winter driving between Island Park and Yellowstone?
Snow tires or chains are strongly recommended from November through April. The highway can receive significant snowfall and black ice. Check Idaho511.com for current road condition updates.

Places in this guide

A warm cabin to come home to

Fireplaces and hot tubs for the cold evenings.

Cabins with hot tubs All cabins

More guides

Guide

Island Park

The springs, falls, rivers and lakes that make Island Park home.

Guide

Yellowstone

The park's highlights most within reach from Island Park and the West Entrance.

Guide

Seasons & What to Pack

Layers, spring snow and summer storms: what to expect each season, and what to bring.

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