Snowbird ski resort in Utah has shut down all uphill access to its slopes while their ski lifts are operating. You can hike up before or after hours with a Snowbird guide. $75 for the first person, $50 for each additional person.

Snowbird Uphill Travel/Hiking Policy and Guidelines: Due to an increase in uphill hiking, skinning and biking, Snowbird is implementing a new uphill travel policy effective February 1, 2015. Skinning, splitboarding and biking are not allowed at Snowbird during winter and spring operating seasons. Unauthorized uphill travel also includes hiking without a Snowbird guide. To arrange a Snowbird guide for uphill hiking call the Snowbird Activity Center at (801) 933-2147 at least 24 hours in advance. Hiking without a Snowbird guide is not permitted during winter and spring operating hours. – snowbird ski resort

This is in stark contrast to Magic Mountain, VT’s uphill policy. At Magic Mountain, if you skin up, they’ll give you one ride to the top for free.