Kylie Jenner and Tyga Take Their Love to the Slopes

Kylie Jenner and Tyga's relationship is cooling off -- weather-wise, that is.

They've already vacationed in Mexico and St. Barts, but this past weekend, the couple headed north for a ski trip to Mammoth Lakes, California, a popular resort town near Yosemite National Park.

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The two grabbed supplies from a Vons in Mammoth on Saturday when a shopper snapped a photo of the pair.

The fan told ET that Jenner was leaning up against Tyga's chest as they were waiting to check out and said the pair "seemed in their own world."

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It wasn't a couple's retreat, however -- Jenner's pals were with the couple at the grocery store and also joined her for some snowboarding on the slopes on Sunday.