"California here we come, right back where we started from… ROAD TRIP!!" wrote Taylor alongside an Instagram pic of her and Karlie posing on a sign at the entrance to the Pfeiffer Big Sur State Park.
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Another snap posted by Taylor shows the duo deep in a forest, looking up at the surrounding greenery. "This forest situation. @karliekloss," she wrote.
A black and white close-up snap of Karlie kissing Taylor garnered almost half a million likes on Instagram. As their adventure drew to a close, Taylor posted a last snap of the pair larking around on a beach.
"Best road trip ever. @karliekloss"
"Beach, forests, cliffs, Northern California, sand, flower picking. Best road trip ever. @karliekloss," she captioned the photo.
Karlie also gave her fans a glimpse into the road trip. She posted a picture of her and Taylor posing in front of an elephant seal. "Another epic pit stop...Do you see the size of that elephant seal?!," she wrote.
Karlie Kloss: "Another epic pit stop...Do you see the size of that elephant seal?!,"
She shared a playful shot of the two of them jumping on a beach, with a simple caption of a heart logo.
Karlie isn't Taylor's first famous friend. She is also pals with Justin Bieber's ex-girlfriend Selena Gomez, Modern Family's Sarah Hyland and Miley Cyrus.