We're grateful to the photographers whose freely licensed work appears on this site. Attributions and licences are listed below.
“Dog sledding in Long Lake, Minnesota” by Lorie Shaull.
Licensed under CC BY 2.0, via Wikimedia Commons. Resized for web use.
“Snowmobiles riding the park road with the Tetons in the background” by Jacob W. Frank / National Park Service.
Public domain, via Wikimedia Commons. Resized for web use.