When traveling to and from West Yellowstone, keep an eye out for wildlife on or near the highways, especially late in the day and early mornings.

Be courteous to bicyclists and obey all posted speed limits, for the safety of yourself and others.

Yellowstone Park Road Information

The road between the North and Northeast entrances is open to auto travel all year long. It provides access to Mammoth Hot Springs and Cooke City, Montana. Call 307-344-2117 for road updates. Call 511 from your cell phone to check on the status of other roads outside the park.

Gibbon River Bridge (north of Norris Campground road) to Gardner River Bridge (north of Indian Creek Campground road): expect road construction delays of up to 30-minutes.

    • Nightly closures from 11:00 p.m. to 7:00 a.m., Sunday through Thursday nights. The road will NOT be closed Friday and Saturday nights.
    • Labor Day weekend starting at 6 p.m. Friday, August 29, through 6 a.m. Tuesday, September 2: no road construction activities will occur on the Norris to Mammoth road project.
    • Please note: starting September 14 at 11:00 p.m. to September 30 at 7:00 a.m., will have a full-road closure 24 hours a day. The detour for this section will be over Dunraven Pass.
    • Starting October 1st until the road closes for the season, expect daytime delays of up to 30-minutes and no night time closures.
    • The detour for this section will be over Dunraven Pass.

      Isa Lake Bridge Replacement: Construction is underway with possible half hour delays. The road linking West Thumb and Old Faithful closes September 2 at 6:00 AM for the season—traffic to detour through West Thumb, Lake, and Canyon. Visitors will still be able to travel south from Old Faithful as far as the trailhead to Lone Star Geyser and north from West Thumb Junction to access the DeLacy Creek Trailhead.
  • North Entrance to Mammoth Hot Springs September 15 through September 25, Monday through Thursday, 8 AM to 5:30, possible 30-minute delays due to paving activities.

    Click here for road construction map and detailed information.

Fall Road Closing Dates (to prepare for winter):

  • September 2: Old Faithful to West Thumb at Craig Pass closes for the season due to road construction.
  • October 14: Dunraven and Beartooth Passes; roads close at 8:00 a.m.
  • November 3: All roads except the road between the North and Northeast Entrance close at 8:00 a.m.

Plan ahead by allowing extra time or finding an alternate route. We also suggest these tips for summer travel:

  • Make sure to pack some extra water or beverages, tuck in a few snacks and make sure your camera batteries are charged
  • When you hit a delay, stop your car, roll your windows down, turn off the engine and enjoy the smells, sights and sounds of Yellowstone. Watch for wildlife along the rivers and streams, hidden at the edge of the forests, or colorful song birds in the trees above
  • Meet your ‘neighbors,’ exchange Yellowstone adventures, and get the latest wildlife sightings

Grand Teton National Park Roads

As you plan your 2014 Yellowstone National Park trip, keep in mind you may run into some Grand Teton road construction on the way. Here are the details for this summer’s activities.

In general, you should expect varying traffic delays within Grand Teton National Park and  John D. Rockefeller, Jr. Memorial Parkway. These projects are set to begin in early May and last through October or November in some cases.

Highway 26/89/191 (Hwy 89): An overlay project will be underway on 10.5 miles of Hwy 89between Craighead Hill, approximately one mile north of Moose Junction, and Cunningham Cabin that lies north of Triangle X Ranch. Expect 30-minute delays, 7 days per week from June—September. Because regular delays are expected, motorists should plan for extra time to reach their destination, or choose to travel the Teton Park Road to avoid the construction area altogether. Blacktail Ponds Overlook and the Teton Point Turnout will be closed May—September, 2014 to accommodate this project. Periodic closures of other parking areas within the project area will occur during specific construction activities.

Phase 3 Pathway: Construction of the third segment of pathways in Grand Teton National Park will occur adjacent to Hwy 89 from Moose Junction to Antelope Flats Junction (1.2 miles) from August 2014 through October 2015. Further information will be provided as the construction time nears; however, motorists can expect some delays during the fall 2014 construction phase.

Hwy 89, North Park Road, Teton Park Road, Jenny Lake scenic loop, and associated parking areas: Annual striping projects will be underway during May, with minimal delays possible.

Outside of Yellowstone and Grand Teton National Parks:

Idaho US Hwy 20 I-15 Work on the shoulder. Between Exit 167: ID 22 ( 1 mile north of the Dubois Area) and exit
180 : Spenser Road ( 3 miles south of the Spencer area). There is work on the shoulder. Comment: Crews installing
signs on shoulder. Use Caution.

Hwy 20 Idaho Falls to Montana: Between North River Road and Wood Road (4 to 7 miles east of the Ashton
area). Road construction work is in progress. The roadway is reduced to one lane. Expect delays. Speed restrictions
are in force. There is a width limit in eect. Look out for aggers. Expect 30 - minute delays. Speed limit 45 MPH.
Width limit 11'0". Until October 9.

West Yellowstone Canyon Street new road paving project will begin last week of September thru 1st week of
October 2014.

  • Montana Highway Updates available at (800) 226-7623 or visit mdt511.com
  • Alternate route to West Yellowstone: Follow Hwy 191 north to Bozeman until it intersects with Hwy 287 (10 miles). Turn west (left) and drive to Ennis. Along the way make sure to stop at the Quake Lake Visitor Center. In Ennis you can take a side trip to the old mining towns of Nevada and Virginia Cities. Or, just continue north from Ennis to the Norris Junction where you can turn right to go to Bozeman, MT or keep going north to I-90
  • Idaho Highway Updates available at (888) 437-7623 or visit 511.idaho.gov