Carrie Underwood's husband and son embark on skiing adventure

Carrie Underwood's husband, Mike Fisher, and her son, Isaiah, are hitting the slopes.

The country superstar posted a photo of them on Instagram that shows them on a mountain. In the shot, Fisher is wrapping his arm around Isaiah as snow falls around them.

"My lil' ski bums ..." Underwood captioned the moment.

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Underwood's Cry Pretty 360 Tour opening act Maddie & Tae were among those to leave comments, writing "We miss sweet Isaiah!!" The "Drinking Alone" singer's record label, UMG Nashville, and trainer Erin Oprea also left adoring remarks on the post.

Isaiah will celebrate his fifth birthday February 27. A week later on March 3, Underwood, 36, will release her new book, "Find Your Path: Honor Your Body, Fuel Your Soul, and Get Strong" with the Fit52 Life.