Here's a sampling of what frosty fans and special access photographers are posting this afternoon on social media, where the NHL feed includes a tweet that "it's so cold sports writers are using pencils instead of pens because ink would freeze." 

Even retired racing legend Mario Andretti chimes in, posting on Facebook:

I'm watching NHL #WinterClassic on NBC. Hockey fans are nuts! 13 degrees, snow falling & 100,000 fans who don't even notice. Great! LOL


Abby Mogg shares this selfie on Instagram.

"What a way to start the new year." -- Ivana Paulova

Tweeted by Halston Hererra, WDIV senior news editor.

By Dmitry Makievsky, via Instagram