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Travel information for US Highway 20 is as follows:

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Frequently Asked Questions Closures & Advisories
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Variable Speed Limits
Chain Law
Neighboring States

District Comments
District 2 (Central)
District 5 (Northwest)


Conditions
Route Location Conditions Advisories Restrictions Last Report Time Cameras Sensors
Cody
NWS Forecast
Between Pahaska and the Shoshone National Forest Boundary Dry Falling Rock None May 12, 2026, 04:13 PM    
Between the Shoshone National Forest Boundary and Cody Dry Falling Rock None May 12, 2026, 04:13 PM   Cody (West)  
Between Cody and the Big Horn County Line Dry None None May 12, 2026, 04:13 PM   Eagle Pass  
Basin
NWS Forecast
Between the Big Horn County Line and 4 miles west of Greybull Dry None None May 12, 2026, 04:13 PM   US 14/16/20 / WYO 32 Junction  
Between 4 miles west of Greybull and Greybull Dry None None May 12, 2026, 04:13 PM   Greybull (South)  
Between Greybull and Basin Dry None None May 12, 2026, 04:13 PM   Greybull (South)  
Between Basin and MM 176, Washakie/Big Horn County Line Dry None None May 12, 2026, 04:13 PM   Manderson  
Worland
NWS Forecast
Between Washakie/Big Horn County Line and Worland Dry None None May 12, 2026, 04:13 PM   Worland (South)  
Between Worland and Mile Marker 148, Washakie/Hot Springs County Line Dry None None May 12, 2026, 04:13 PM   Worland (South)  
Thermopolis
NWS Forecast
Between Mile Marker 148, Washakie/Hot Springs County Line and Thermopolis Dry None None May 12, 2026, 04:13 PM   Kirby Junction  
Between Thermopolis and Boysen Dam Dry Falling Rock US 20 BUS/WY 789 from milepost 116.100 to 116.500
Width restriction: 12 ft
Height restriction: 15 ft
May 12, 2026, 04:13 PM   Boysen Dam Wind River Canyon Thermopolis (South)  
Shoshoni
NWS Forecast
Between Boysen Dam and Shoshoni Dry None None May 12, 2026, 04:13 PM   Shoshoni (North) Boysen Dam  
Between Shoshoni and Moneta Dry None None May 12, 2026, 04:13 PM   Moneta Shoshoni (North)  
Between Moneta and Waltman Dry None None May 12, 2026, 04:13 PM   Waltman Hiland   Hiland
Casper
NWS Forecast
Between Waltman and Casper Dry None None May 12, 2026, 04:07 PM   Natrona   Natrona
Between Casper and Glenrock Dry None None May 12, 2026, 04:07 PM     Hat Six
Douglas
NWS Forecast
Between Glenrock and Douglas Dry None None May 12, 2026, 04:07 PM   Natural Bridge Interchange Deer Creek   Deer Creek Hat Six
Between Douglas and I-25, Orin Jct Dry None None May 12, 2026, 04:07 PM   Orin Junction East Douglas  
Between I-25, Orin Jct and Lost Springs Dry None None May 12, 2026, 04:07 PM    
Lusk
NWS Forecast
Between Lost Springs and Lusk Dry None None May 12, 2026, 04:07 PM   Lusk  
Between Lusk and the Nebraska State Line Dry None None May 12, 2026, 04:07 PM   Duck Creek Van Tassell   Van Tassell

Construction Projects
Project Name Project Number WYDOT Contact Contractor Contact Start Date Completion Date Description Road Milepost(s) Surface Delays Last Updated
Road work near Casper I-25 mm 186-188 Road Work Tim Rasnake
307-322-6500
None Apr 17, 2026 Jun 30, 2028 Reconstruction (1 bridge, and 5 overhead sign structures), bridge replacement (2 structures),replace water and sewer mains, and enhancements; Involving placing concrete pavement, installing median barrier, placing road base, installing shoulder barrier, applying pavement markings, erecting structural steel, placing MSE wall, excavation, replacing overhead sign structures, removing concrete pavement, placing structural concrete, and installing traffic signal system on I-25 beginning at RM 187.99 at the Casper Marginal (McKinley - Yellowstone Section) for approximately 2.0 miles in Natrona County.______________________

US87

US20

US26

I25

187 to 189 Paved Construction zone speed limit 45 MPH Apr 22, 2026, 07:33 PM
Yellowstone National Park - Cody, Palisades Section N311107 None Mountain Construction Company
Lovell , WY
307-548-7186
May 1, 2026 Oct 31, 2026 Overlay and Chip Seal with slope flattening, guardrail repair and drainage work on approximately 9.85 miles on US 14/16/20 beginning at RM 10.249 and ending at RM 20.102.

17THST

SHERIDANAVE

US16

YELLOWSTONEHWY

US14

US20

WY120

GREYBULLHWY

8THST

10.25 to 20.1 Paved 20 minute delays with stopped conditions May 4, 2026, 11:11 AM
*Chain Law - Level 1 Definition
**Chain Law - Level 2 Definition
Other Definitions

Impact Levels Description / Recommended Action
Low Minimal impacts expected, use general caution.
Moderate Some impacts expected, use extra caution. Stay alert for changing road and weather conditions.
High Dangerous impacts expected, use extreme caution, delay travel or consider alternate route. If travel is necessary, slow down and allow extra time.
CLOSED Per W.S. 24-1-109, motorists traveling on a closed road without permission from WYDOT or WHP may be subject to a fine of up to $750 and/or up to 30 days imprisonment.
Seasonal / Long-Duration Event Impact level used to distinguish long-duration events from emergent events.
All travelers are encouraged to check present conditions and forecasts before departing.