Per WYDOT, Highway 22 Teton Pass is scheduled for a closure on Thurs Apr 23 from 9a to 11a. See link for details. 
Per Wyoming Department of Transportation (WYDOT) - WY22: The Wyoming Department of Transportation has scheduled a closure of Teton Pass for Thursday, April 23rd, from 9:00am to 11:00am to conduct target acquisition with the M101 Howitzer. There will be no public access allowed at Phillips Bench, Teton Pass Summit, and Coal Creek from 5:00am to 11:30am. Highway travelers and backcountry users are advised to plan accordingly. Thank you for your cooperation. 21-APR 13:10
Address/Location
Teton County Emergency Management
3240 Adams Canyon Dr
Jackson, WY 83001
Contact
Emergency: 9-1-1
Non-emergencies: 307-733-9572
Wyoming Department of Transportation