The trio, who were joined by another gal pal, met up at the gym earlier in the day for an early morning session before hitting the trails.
Just the night before, Julianne headed back to her Dancing With The Stars roots and guest judged on the show.
FYI: Cara is wearing a Fabletics tee and leggings. Nikki is wearing a Lanston tank.
20+ pics inside of Julianne Hough and Nikki Reed…