Courtesy of the UAC:
Alta
No uphill traffic allowed during operating dates. No pre-season access to Snowbird from Alta Ski Area. Allowed pre and post season except when marked by sign at the base.
https://www.alta.com/the-mountain/mountain-policy-statements
Beaver Mountain
Allowed pre-season. Restrictions when operating.
http://www.skithebeav.com/c/mountain/mountain-safety
Brighton
Uphill travel is allowed with restrictions. Visit
http://www.brightonresort.com/Documents/Brighton/Uphill%20Travel.pdf for details.
Park City
Uphill travel is permitted on the Park City base side from 6:00pm to 8:30am on the designated route only from December 15th until closing day. The designated route is from the bottom of First Time Lift, up Homerun to the Angle Station. There is NO uphill travel beyond the Angle Station. Please follow the link to the resort web page for further details. There is NO uphill travel on the Canyons Village base side. Visit
https://www.parkcitymountain.com/the-mountain/more-options/mountain-safety.aspx?tc_1=7 for details.
Deer Valley
The following activities, SLEDDING, UPHILL TRAVEL, CROSS-COUNTRY SKIING, SNOWBOARDING, SNOWMOBILING, AND HIKING ARE NOT PERMITTED AT DEER VALLEY AT ANY TIME OF THE DAY OR NIGHT DURING THE SKI SEASON.
http://www.deervalley.com/WhatToDo/Winter/SafetyPage
Nordic Valley:
Uphill allowed on set runs with uphill pass.Visit
https://nordicvalley.comfor details.
Powder Mountain:
Powder Mountain only allows uphill travel in designated areas and along approved routes. Visit
www.powdermountain.com for details.
Snowbasin:
Uphill travel is allowed subject to certain restrictions. Visit
[URL]https://www.snowbasin.com/the-mountain/mountain-safet[/URL]y/ for details.
Snowbird:
No uphill travel is allowed at Snowbird during winter and spring operating seasons. Visit
https://www.snowbird.com/mountain-safety/ for details.
Solitude:
Solitude Mountain Resort does not allow unauthorized uphill travel within its Resort boundaries. Visit
https://www.solitudemountain.com/mountain-and-village/mountain-information/mountain-policies.
Sundance
Sundance Mountain Resort does not allow unauthorized uphill travel at any time of the day or night.